【导语】十年寒窗，开出芬芳;十年磨剑，努力未变;十年坚守，成功守候。十年的风雨兼程奋力追逐，让梦想现实的时刻。祝努力备考，金榜题名，考入理想院校。
以下是润雨教育为大家整理的《2019成人高考高起点英语基础试题及答案》供您查阅。
【第一篇】
一、语音知识：共5小题;每题1.5分。共7.5分。在下列每组单词中，有一个单词的划线部分与其他单词的划线部分的读音不同。找出这个词。
第1题单选 _______
A. comb
B. Globe
C. Smoke
D. clock
第2题单选 _______
A. Explain
B. Extent
C. Exhausted
D. expand
第3题单选 _______
A. Humble
B. hotel
C. Honesty
D. horizon
第4题单选
A. shoes
B. Goes
C. Does
D. noses
第5题单选 _______
A. chimney
B. chicken
C. Chemistry
D. chairman
二、词汇与语法知识：共15小题;每题1.5分，共22.5分。从每小题的四个选择项中，选出的一项。
第6题单选 In China,_______bicycle is _______popular means of transportation.
A. the;a
B. a;不填 ,
C. the;the
D. a;the
第7题单选 Where is the farm_______your brother is working?
A. that
B. Which
C. on which
D. in which
第8题单选 The volleyball match will be put off if it________
A. will rain
B. Rained
C. Rains
D. is raining
第9题单选 He had a wonderful childhood,_______with his mother to all comers of the world.
A. travel
B. to travel
C. Traveled
D. traveling
第10题单选 Jack described his father,who_________ a brave boy many years ago,as a strong-willed man.
A. would be
B. would have been
C. must be
D. must have been
第11题单选 Send my regards to your wife when you________home.
A. Wrote
B. will write
C. have written
D. write
第12题单选 Where_______in the past three years?
A. had you gone
B. have you gone
C. did you go
D. have you been
第13题单选 Drunk driving,which was once a________occurrence, is now under control.
A. General
B. frequent
C. Normal
D. particular
第14题单选 He suddenly returned________a rainy nigh.
A. at
B. On
C. In
D. during
第15题单选 Lots of rescue workers were working around the clock, _______supplies to Yushu, Qinghaiprovince after the earthquake.
A. sending
B. to send
C. having sent
D. to have sent
【第二篇】
(A)
Fire can help people in many ways. Fire can heat water， (1)____ your house， give light and cook food. But fire can burn things too. Nobody knows (2)____ people began to use fire. One story from Australia tells about a man a very long time ago. He (3)____ the sun by a rope and brought fire down.
Today people know how to (4)____ a fire with matches. Children sometimes like to play with them. But matches can be very (5)____.
Fire kills people every year. So you must be careful (6)____ matches. You should also learn to (7)____ fires. Fires need oxygen. Without oxygen they die. There is (8)____ in the air. Cover a fire with water， sand， or (9)____， with your coat or a blanket. This keeps the air from a fire and kills it.
Be careful with fire， and it will help you. Be careless with fire， and it might (10)____ you.
1. A. brighten B. warm C. beautify D. lighten
2. A. where B. when C. what D. how
3. A. watched B. got up to C. went up to D. discovered
4. A. set B. make C. cause D. catch
5.A. dangerous B. bright C. unusual D. common
6. A. about B. to C. On D. afterwww.Examda.CoM
7. A. lay out B. put out C. put away D. do away with
8. A. fire B. moisture C. oxygen D. substance
9. A. in general B. in particular C. in a hurry D. in an emergency
10. A. injure B. hurt C. destroy D. spoil
(B)
Here is another program in the series， "Famous Personalities (个性)。" This afternoon I am going to talk (11)____ the famous film director， Daniel Z. Sloman. Dan Sloman doesn't need any introduction from me. He has directed "Goodbye to Boston"， "Pacific Story" and many other famous films. "Tell me， Dan， have you ever directed a film in England?"
"Why， yes， Peter. I directed 'Green Years' here."
"Oh course. How long (12)____ was that， Dan?"
"That was five years ago. That film was about life in an English village."
"What can you remember about this (13)____， Dan?"
"Lots of things， Peter. When we were filming in the open， it usually (14)____ to rain!"
"You rebuilt half the village， I believe， Dan."
"That's right， Peter. We built a (15)____ over the river. We put a few buildings. (16)____ our men were working， half the (17)____ watched us."
"Were the villagers against the film?"
"Oh， no. Many villagers (18)____ a lot of money. Thousands of tourists came to the village. The place (19)____ famous."
"Have you ever been back to the village since then?"
"I can't say I have， Peter. But I remember it well."
"What else do you remember about the film， 'Green Years'， Dan?"
"Well， I remember the actors， of course. In one scene we (20)____ a thousand 'extras'."
"And you used the villagers."
"That's right， Peter. There were 2000 men， women and children in the village and we used a thousand of them. Every man has his price. We paid each villager fifty pence to take part in the film."
"What about the villagers that weren't in the film?"
"They came to watch."
"What happened then?"
"It was very funny， Peter. We couldn't keep them out of it. We paid half the villagers fifty pence each to act in the film. And we paid the other half of the villagers five pounds each not to join in the film! But it was a great scene. I'll never forget it."
"Thank you， Dan."
11. A. to B. about C. for D. into
12. A. before B. ago C. after D. since
13. A. life B. village C. year D. film
14. A. begins B. began C. had started D. beginning
15. A. road B. way C. village D. bridge
16. A. As soon as B. After C. Before D. While
17. A. town B. city C. village D. country
18. A. made B. took C. carried D. brought
19. A. is B. gets C. became D. get
20. A. asked B. dismissed C. needed D. told
答案： 1. B 2. D 3. C 4. B 5. A 6. A 7. B 8. C 9. D 10. B 11. A 12. B 13. D 14. B 15. D 16. D 17. C 18. A 19. C 20. C
【第三篇】
Ⅰ. Phonetics (10 points)
Directions:
In each of following groups of words, there are four underlined letter combinations marked A, B, C and D. Compare underlined parts and identify the one that is different from the others in pronunciation. Mark your answer by blackening the corresponding letter on the Answer Sheet.
1.A. enough B. about C. touch D. young
2.A. thirsty B. throat C. youth D. those
3.A. shut B. cut C. funny D. use
4.A. thanks B. pills C. news D. films
5.A. dear B. heart C. ear D. tear
6.A. births B. depths C. months D. mouths
7.A. election B. pronunciation C. question D. operation
8.A. hot B. home C. top D. off
9.A. may B. day C. stay D. Sunday
10.A. weigh B. eight C. seize D. daily
Ⅱ. Vocabulary and Structure (40 points)
Directions:
There are 40 incomplete sentences in this section. For each sentence there are four choices marked A, B, C and D. Choose one answer that best completes the sentence and blacken the corresponding letter on the Answer Sheet.
11. _______ we won the war.
A. In the end B. On the end C. By the end D. At the end
12. As a poor fresh student, he had to do a part-time job _______ money.
A. owing to B. because of C. on account of D. for the sake of
13. Too much drinking would ______ his health.
A. do harm for B. do harmful to C. do harm to D. do harmful for
14. The days _______ you could travel without a passport are a thing of the past.
A. in which B. on which C. of which D. at which
15. He insists that he ______ innocent.
A. is B. be C. should be D. were
16. The teacher said, “Stop ______”. So we stopped _______.
A. to talk…to read B. talking…to read C. talking…reading D. talking…read
17. Could I have some milk, some orange juice, and some eggs ______?
A. instead of B. in addition C. as well D. so much
18. ______ after his death that he was recognized as a great composer.
A. It was not until B. It is until C. It was until D. Not until
19. Our classroom is ______ in the school building.
A. bigger than any other one B. bigger than all
C. the biggest of all the others D. the biggest of any one
20. It was Thomas Alva Edison who ______ the electric lamp.
A. discovered B. invented C. innovated D. found
21. I’d like you ______ to see him.
A. go B. going C. to go D. have gone
22. Your coat ______ his.
A. like B. likes C. is like D. will look like
23. Either you or I _____ meet him at the airport.
A. are to B. is to C. am to D. were to
24. Each has an apple, ______?
A. has he B. doesn’t he C. does he D. don’t they
25. Sports, ______ perhaps you don’t like very much, may make you strong.
A. that B. which C. it D. and
26. We should look ______ the matter before we reach a conclusion.
A. into B. for C. to D. at
27. Hospital doctors don’t go out very often as their work _______ all their time.
A. takes away B. takes in C. takes over D. takes up
28. He is ______ to speak the truth.
A. too much of a coward B. too much a coward
C. so much a coward D. so much of a coward
29. It’s strange that you ______ like that at the meeting.
A. should speak B. spoke C. should have spoken D. speak
30. He ______ when the bus came to a sudden stop.
A. was almost hurt B. was to hurt himself
C. was hurt himself D. was hurting himself
31. Mary likes _______ very much, but she didn’t go _______ last Sunday.
A. to swim…swimming B. swimming…to swim
C. to swim…to swim D. swimming…swimming
32. More ______, less speed.
A. hurry B. rush C. quickness D. haste
33. ______ with the size of the whole earth, the highest mountain doesn’t seem high at all.
A. When compared B. Compare C. While comparing D. Comparing
34. The fact ______ money orders can usually be easily cashed has made them a popular form of payment.
A. of B. is that C. that D. which is
35. He is working very hard to ______ the lost time in the past 10 years
A. make for B. make up for C. make up D. make out
36. If a child is absent ______ school for long periods, he should be given extra work.
A. at B. in C. from D. out of
37. Neither of your proposals ________.
A. make sense B. are practical C. makes sense D. make senses
38. It is obvious that there are at least two vitamins. ______ is soluble in fat; _____ is soluble in water.
A. The one…the other B. One…the other
C. One…another D. One…the another
39. It’s a good _______ to eat with the mouth closed.
A. custom B. habit C. way D. style
40. You ought not to _______ him the news that day.
A. tell B. be telling C. have told D. be told
41. He attempted _______ to set up a company of his own.
A. with vain B. on vain C. in vain D. of vain
42. —“I slipped on the stairs. I think my arm is broken”.
—“Oh! I _______.”
A. don’t hope B. hope not so C. do not hope D. hope not
43. The last man ______ the sinking ship was the captain.
A. left B. leaves C. to be leaving D. to leave
44. One of his many faults is that that he never ______ any thing very long.
A. decides on B. sticks to C. goes over D. makes up
45. You are worthy _______ the honour.
A. to B. at C. for D. of
46. Billing pitched so well ______ everyone cheered him at the end of the game.
A. as B. since C. that D. whereas
47. The _______ of blood always makes him feel sick.
A. sight B. view C. look D. form
48. A child learns to read by seeing the words _______.
A. properly B. repeatedly C. repeatly D. obviously
49. Our friendship is ______ and we will never again be separated.
A. restored B. reserved C. restrained D. repeated
50. He couldn’t explain the _______ of ten years in his job history.
A. gap B. interrupting C. opening D. margin
【第四篇】
Ⅲ. Cloze (20 points)
Directions:
For each blank in the following passage, there are four choices given below and marked A, B, C and D. Choose the one that is most suitable and mark your answer by blackening the corresponding letter on the Answer Sheet.
Investors can _51_ money simply by loaning it. The money they loan is called capital. Security (担保) is an expensive item which the borrower mortgages (抵押) to the investor to show that he intends to _52_ the debt. The way investors make money on loans is to charge interest. Interest is money that _53_ pay to investors for the use of their money. Interest is usually a certain percentage of the capital. Investors sometimes _54 ten percent or more interest per year. The interest may be calculated daily, monthly, or yearly. The interest must be _55_ before the capital can be repaid. If the interest is not _56_ the agreed rate, the interest is added _57_ the capital. Then the borrower has _58_ pay interest on the unpaid interest _59_ on the capital. A debt can grow quickly this way. If the total of the capital and accumulated interest gets too high, the investor will take _60_ of the item used as security and sell it to get his money back.
51.A. get B. make C. have D. carry
52.A. repay B. leave C. get D. give
53.A. borrowers B. lenders C. peoples D. others
54.A. cost B. ask C. charge D. change
55.A. by day B. by the day C. every day D. daily
56.A. paid B. to be paid C. pay D. paying
57.A. on B. to C. for D. with
58.A. to B. on C. into D onto
59.A. or B. also C. but also D. as well as
60.A. the place B. possession C. turn D. care
Ⅳ. Reading Comprehension (60 points)
Directions:
There are four reading passages in this part. Each passage is followed by five questions. For each question there are four suggested answers marked A, B, C and D. Choose one best answer and blacken the corresponding letter on the Answer Sheet.
Passage One
Students enrolled at least half time may borrow up to $3,000 form the government over a two-year period. Repayment of the loan begins six months after the student leaves school. These loans c
arry on interest until this time. The current interest rate is 5 percent. Students may borrow up to $4,500 annually from a bank, credit union, savings and loan association or other eligible lender. Repayment on these loans usually begins six months after the student leaves school. These loans carry no interest until this time. This current interest rate is 9 percent. Parents may borrow up to $300 annually for each dependent college. Repayment begins forty-five days after receiving the loan, and the interest rate is 12 percent.
61. Which of the following is the main purpose?
To remind students and their families to repay their loan.
To compare interest rates.
To inform students and parents of the various loans available.
To show that government loans charge the least interest.
62. The highest interest rate is charged to _______.
A. full-time students B. parents
C. students borrowing from a credit union D. half-time students
63. If parents had three children in college how much could they borrow annually?
A. 900 B. 3,000 C. 300 D. 9,000
64. According to the passage which of the following is true.
The government lends students enrolled at least half time up to 3,000 annually.
Students may borrow up to $4,500 annually from four sources.
Students enrolled less than half time may borrow money.
The current interest rate from banks is 5 percent.
65. It can be inferred from the passage that _______.
the student’s school determines who is an eligible lender
money is available for student loans
students need not be enrolled half time to borrow money
the interest rate on student loans is increasing
Passage Two
Are you aware that you actually possess six senses? The sixth is a muscular sense responsible for directing your muscles intelligently to the exact extent necessary for each action you perform. For example, when you reach for an object, the sensory nerves linking the muscles to the brain stop your hand at the correct spot. This automatic perception of the position of your muscles in relation to the object is your muscular sense in action.
Muscles are stringly bundles of fibers varying from one five-thousandth of an inch to about three inches. They have three unique characteristics, they can become shorter and thicker; they can stretch; and they can retract to their original positions. Under a high-powered microscope, muscle tissue is seen as long, slender cells with a grainy texture like wood.
More than half of a person’s body is composed of muscle fibers, most of which are involuntary—in other words, work without conscious direction. The voluntary muscles, those that we move consciously to perform particular actions, number more than five hundred. Women have only 60 to 70 percent as much muscle as men for their body mass. That is why an average woman can’t lift as much, throw as far, or hit as hard as an average man.
66. According to the selection, the muscular sense is responsible for ______.
A. the efficiency of our muscles B. the normal breathing function
C. directing our muscles intelligently D. the work of only our involuntary muscles
67. Intelligent use of the muscles means that ________.
one always knows what his muscles are doing
one performs simple actions whithout working
one’s muscles are used only to the extent necessary for each action they perform
one improves muscular action consciously
68. Muscles are unique fibers because, they can ________.
A. contract B. stretch C. retract D. do all of the above
69. Under a microscope, muscle cells appear to be _______.
A. textured like wood B. colored like wood
C. smooth and red D. short and thick
70. According to the selection more than half of a person’s body is composed of ______.
A. voluntary muscles B. involuntary muscles
C. muscle fibers D. sensory nerves
Passage Three
The large part which war played in English affairs in th
e Middle-Ages, the fact that the control of the army and navy was in the hands of those that spoke French, and the circumstances that much of English fighting was done in France all resulted in the introduction into English of a number of French military terms. The art of war has undergone such changes since the battles of Hastings, Lewes, and Agincourt that many words once common are now only in historical use. Their places have been taken by later borrowings, often like wise from French, many of them being words acquired by the French in the course of their wars in Italy during the sixteenth century. Yet we still use French words of the Middle Ages when we speak of the army and the navy, of peace, enemy, battle, soldier, guard and spy, and we have kept the names of officers such as captain and sergeant. Some of the French terms were introduced into English because they were needed to express a new object or a new idea. In other cases a French and a native English word for the same thing existed side by side. Sometimes one or the other has since been lost from the language; but sometimes both the borrowed and the native word have been still in common use.
71. The main idea of this passage is that ______.
most of today’s common English military terms dated from the sixteenth century or later
a study of the English vocabulary shows the important part which war has played in the history of England
many French words borrowed into English during the Middle Ages have since disappeared from the language
many military terms used in English were originally borrowed from French, some as early as the Middle Ages
72. All of the following have something to do with the introduction into English of many French military terms except that _______.
war played an important part in English affairs in the Middle Ages
the English army and navy were controlled by those who spoke French in the war between England and France
France invaded England in the Middle Ages and many battles were fought in England
much of English fighting was done in France in the war between England and France
73. The art of war has undergone such changes that _______.
we no longer use any French words of the Middle Ages
many words once common are not used any longer and they are replaced by Italian words
French military terms have disappeared from the English language
many words once common are now only in historical use and their places have been taken by the newly-borrowed words
74. Which of the following is not the French word borrowed into English during the Middle Ages?
A. sergeant B. battle C. spy D. fight
75. The writer takes the words “battle” and “fight” as an example to show______.
French words are needed to express something new
a French and a native word for the same thing have been still in common use side by side French word or the other has been lost from the English language
“battle” is the borrowed word and “fight” is the native one
Passage Four
“Fingers were made before forks” when a person gives up good manners, puts aside knife and fork, and dives into his food, someone is likely to repeat that saying.
The fork was an ancient agricultural tool, but for centuries no one thought of eating with it. Not until the eleventh century, when a young lady from Constantinople brought her fork to Italy, did the custom reach Europe.
By the fifteenth century the use of the fork was widespread in Italy. The English explanation was that Italians were averse to eating food touched with fingers, “Seeing all men’s fingers are not alike clean.” English travellers kept their friends in stitches while describing this ridiculous Italian custom.
Anyone who used a fork to eat with was laughed at in England for the next hundred years. Men who used forks were thought to be sissies, and women who used them were called show-offs and overnice. Not until the late 1600’s did using a fork be
come a common custom.
76. The custom of eating with a fork was _______.
A. brought to Europe from America B. begun when forks were invented
C. brought to Europe from Asia D. invented by Italians
77. By the fifteenth century forks were used _______.
A. all over Italy B. only in Constantinople
C. widely in Europe D. In England
78. To English travellers in Italy, the use of forks seemed _______.
A. clever B. necessary C. good manner D. ridiculous
79. The English thought that Italians used forks in order to ________.
A. imitate the people of the East B. keep their food clean
C. impress visitors with their good manners D. amuse the English
80. In England, people who used forks at that time were considered ______.
A. well mannered B. sissies C. show-offs and overnice D. both B and C
Ⅴ. Writing (20 points)
Directions:
For this part, you are allowed 20 minutes to write a short composition of about 80 words on the title: The Bicycle in China. Base your composition on the outline given below.
1.在中国，自行车是最为流行的交通工具。
2.骑自行车有许多好处。
3.自行车的未来……
参考答案
Ⅰ. Phonetics
1.B 2.D 3.D 4.A 5.B 6.D 7.C
8.B 9.D 10.C
Ⅱ. Vocabulary and Structure
11.A 12.D 13.C 14.A 15.A 16.B 17.C
18.A 19.A 20.B 21.C 22.C 23.C 24.B
25.B 26.A 27.D 28.A 29.C 30.A 31.B
32.D 33.A 34.C 35.B 36.C 37.C 38.B
39.B 40.C 41.C 42.D 43.D 44.B 45.D
46.C 47.A 48.B 49.A 50.A
Ⅲ. Cloze
51.B 52.A 53.A 54.C 55.D 56.A 57.B
58.A 59.D 60.B
Ⅳ. Reading Comprehension
61.C 62.B 63.A 64.B 65.B 66.C 67.C
68.D 69.A 70.C 71.D 72.C 73.D 74.D
75.B 76.C 77.A 78.D 79.B 80.D
Ⅴ. Writing
The Bicycle in China
The bicycle is the most popular means of transportation in China. China is a country “on bicycle wheels”. People ride them for various purposes such as going to and from school and work. Bicycles are very cheap and easy to buy in China.
There are many advantages to riding a bicycle. First, using a bicycle can greatly help reduce the air pollution in many big cities. Second, people can improve their health by riding a bicycle.
The future of bicycle will be bright. In some European countries, city governments have arranged pedestrians to use “public bicycles” to travel round the city center free of charge.
【第五篇】
1. Nearly all the streets are in straight lines, ________ from east to west. Those ________ run from north to south are called avenues. A. running; that B. run; who C. running; who D. run; that
2. This is the case ________ he’s had all his money stolen.
A. when B. where C. that D. on which
3. Mr. Smith will pay a visit to Beijing this autumn, ________ we will enjoy the Olympic Games in 2008.
A. where B. when C. which D. how
4. The artist will not paint people or animals but he will paint anything ________ .
A. that the little girl asks him B. the little girl asks him to
C. for the little girl to ask him D. what the little girl asks him
5. —How did you get in touch with the travel agent, Robin?
—Oh, that’s easy. I surfed the Internet and then called one ________ the telephone
number is provided. A. which B. in which C. of which D. whose
6. October 15 th is my birthday, ________ I will never forget.
A. when B. that C. what D. which
7. The treatment will continue until the patient reaches the point ________ he can walk correctly and safely.
A. when B. where C. which D. whose
8. There are several research centers in China ________ a certain disease called Bird Flu is being studied.
A. which B. where C. when D. what
9. I hope that the little ________ I have been able to do does good to them all.
A. which B. what C. that D. when
10. The time is not far away ________ modern communications will become widespread in China’s vast countryside. A. as B. when C. until D. before
11. ________ is known to everybody, Taiwan is a part of China. We must unify it.
A. It B. As C. Which D. What
12. I shall never forget the day ________ Shen Zhou V was launched, ________ has a great effect on my life.
A. when, which B. that, which C. which, that D. when, that
13. The bread my wife makes is much better than ________ you can buy at a store.
A. that which B. one that C. that of which D. this of which
14. There is no such place ________ you dream of in all this world.
A. that B. what C. which D. as
15. The people, ________ had been damaged by the flood, were given help by the Red Cross.
A. all whose homes B. all of whose homes C. all their homes D. all of their homes
16. The humans are destroying nature day by day, ________ of course, will cause severe punishment from it sooner or later. A. who B. when C. on which D. which
17. Is this research center ________ you visited the modern equipment last year?
A. where B. that C. the one that D. the one where
18. Some pictures of the river brought the days back to the old ________ they swam in it.
A. when B. that C. who D. where
19. The man showed us so heavy a stone ________ no man can lift.
A. that B. as C. which D. and
20. He stayed there for quite a long time, during ________ time he learned much spoken English.
A. that B. this C. which D. same
参考答案及解析：
1. A. 主语与run(延伸)是主动关系，所以用现在分词。Those指街道，所以不用who而用that来引导定语从句。
2. B. 因为在此题中where引导定语从句，表示“在这种种况下”，与in which相当。
3. A. 因为先行词是Beijing而不是this autumn所以用where引导定语从句。
4. B. 答案B是省略了关系代词that的定语从句，另外，to后还省略了动词原形paint。
5. C. 因为of which引导定语从句，并在从句中作定语。of which the telephone number = whose telephone number。
6. D. 因为这是个非限制性定语从句，先行词是前面一句话的内容。
7. B. 因为表示“阶段、程度、地步”的the point在定语从句中作地点状语，所以用where引导定语从句。
8. B. 因为先行词是research centers并在定语从句中作状语，所以用where。
9. C. 因为当先行词是表示事物的all, little, few, much, anything, everything, nothing等时，多用that引导定语从句。
10. 因为先行词是the time，且在定语从句中作状语，所以用when引导。此题的先行词与定语从句被主句谓语分开了，要善于辨别。
11. B. 先行词是Taiwan is a part of China整个主句，一般由as或which引导定语从句，但which引导的定语从句只能放在主句之后，另外，as有“正如”之意，而which没有，所以用as。顺便说说，原句改为：It is known to everybody that Taiwan is…= What is known to everybody is that Taiwan is…
12. A. 两空都是考查定语从句，先行词分别是the day和Shen Zhou V was launched, the day在定语从句中作状语，用when引导;后句是非限制性定语从句，不能用that，要用which。
13. A. 因为替代不可数名词 (the bread) 只能用that，排除B和D;又因为先行词that (the bread) 在定语从句中作buy的宾语，用which，所以选A。
14. D. 当定语从句的先行词前有such, so, as等词语时，由as引导，并且as在定语从句中作主语或宾语，as在此题中作dream of的宾语。注意：在表示“如此…以致…”的such /so…that…结构中，that不作任何句子成份。
15. B. 考查非限制性定语从句，all of whose homes = all of their homes他们所有的房子。
16. D. 因为先行词是前面整个句子，且在从句中作主语，所以用which。of course是插入语。
17. D. 将疑问句改为陈述句：this research center is…显然缺少先行词，必须加上代词the one来作先行词，又因定语从句不缺主语或宾语，所以用关系副词where。假若在this后加the，就选where，请想想这是为什么。
18. A. 因为先行词是the days，并在定语从句中作状语。
19. B. 当先行词前有so时，用as引导定语从句，as在从句中作主语或宾语。假若在lift后加上it，答案就是that了，请想想这是为什么。
20. C. 因前后均的句子，必须要选连词，排除B和D;又因在介词后不能用that来引导定语从句，所以选C。during which time在那段时间里。