unit4单元练习_Unit4 单元练习0
unit4单元练习_Unit4 单元练习0
ÊÔ¾í×Ü·Ö:100 µÃ·Ö:100
Vacabulary
渝粤搜题
Choose the best answer for each of the following items.
1. The Everglades National Park _______ 9,000 square miles.
A. takes on
B. turn up
C. takes up
D. turn down
´ð°¸:C国家开放大学作业答案
2.Her parents _______ when she was five, and since then, she¡¯s been living with her grandparents.
A. operated
B. separated
C. neglected国开形成性考核答案
D. celebrated
´ð°¸:B
3.The meeting was _______ to discuss the issue of how to protect the natural environment in the area.
A. shouted
B. called
C. cared
D. taken
´ð°¸:B
渝粤题库
4.She is building up an _______ international reputation, and many diplomats would like to work with her.
A. impressive
B. impractical
C. inaccurate
D. inappropriate
´ð°¸:A
5.When she stood up to speak, her red straw fighting hat firmly _______ place, the crowd began to boo her.
A. at
B. with
C. in
D. on国开形成性考核答案
´ð°¸:C
Grammar
Choose the best answer for each of the following items.渝粤题库
6._______ in Minnesota, Douglas _________ in Massachusetts by her mother and grandparents. ?
A. To be born ¡ was raised
B. Born ¡ is raised
C. Being born ¡ have raised渝粤搜题
D. Born¡ was raised
´ð°¸:D
7.In 1913, a year after _______ from WellesleyCollege, she married Kenneth Douglas. ?
A. graduating
B. graduated
C. being graduated
D. having graduated
´ð°¸:A
8.On the way back, it was snowing so heavily that I couldn¡¯t see anything ahead of me except the footprints I _______ on my way to the river. ?渝粤教育
A. have made
B. ? make ?
C. had made
D. was making
´ð°¸:C
渝粤搜题
9.Thanks largely to Douglas, that part of the Everglades remains _______ .?
A. unchanging
B. unchanged
C. to be changed
D. to change
´ð°¸:B
10.As she _______ so many times before, she spoke calmly of how the mountains needed to be preserved. ?
A. was doing
B. ? does?
C. have done渝粤教育
D. had done
´ð°¸:D
Dialogue
Choose the best answer for each of the following items.渝粤教育
11.¨C Have you ever given any thought to moving south, to one of those retirement communities?
? ¨C ? ? ? ? ? ? ? ? ? ? ? ? ? ??
A. These days people tend to stay at home for a lot of their spare time.
B. I¡¯m not interested in picking up and moving away.渝粤搜题
C. As long as I live near town, I don¡¯t want to trouble anybody.
´ð°¸:B
12.¨C Congratulations! I just heard you got the highest grade on the English exam. ?
? ¨C ? ? ? ? ? ? ? ? ? ? ? ? ? ??
A. No, no. That¡¯s nothing.
B. Yes, everybody did very well in the final exam.?
C. Thank you very much. I¡¯m very glad I did it.
´ð°¸:C
13.¨C We used to sit around the fireplace, the four of us. It was warm and cozy inside.
? ¨C ??????????????????? ? ? ? ??
A. I hate to get out of bed in summer.
B. But outside the snow would be falling.
C. A few years ago, I went back to Brazil.
´ð°¸:B
14.¨C It¡¯s so quiet around here without the kids.?
? ¨C ? ? ? ? ? ? ? ? ? ? ? ? ? ??
A. Yeah, indeed. I was just thinking back to when I was a kid and still living at home.
B. After dinner, we¡¯d play card games, right there at the dining room table.
C. Well, I¡¯m not saying anything is wrong with playing games with the kids.
´ð°¸:A渝粤教育渝粤题库，我们的目标是要做全覆盖、全正确的答案搜索服务。
15.¨C In fact, I can¡¯t even remember seeing him smile. ??
? ¨C ? ? ? ? ? ? ? ? ? ? ? ? ? ??
A. Really? You can tell. It¡¯s just that I¡¯m not comfortable doing it.
B. I mean, you are always so good with the kids, and the grandchildren.?
C. No, but it¡¯s true. I don¡¯t remember once that he played a game with us.
´ð°¸:C
Reading
Read the following passages and choose the best answer for each of the following questions.
Passage 3
¡¡¡¡The modern age is an age of electricity. People are so used to electric lights, radios, televisions, and telephones that it is hard to imagine what life would be like without them. When there is a power failure, people grope about in flickering candlelight, cars hesitate in the streets because there are no traffic lights to guide them, and food spoils in silent refrigerators.
¡¡¡¡Yet people began to understand how electricity works only a little more than two centuries ago. Nature has apparently been experimenting in this field for millions of years. Scientists are discovering more and more that the living world may hold many interesting secrets of electricity that could benefit humanity.
¡¡¡¡All living cells send out tiny pulses of electricity. As the heart beats, it sends out pulses that can be measured and recorded on the surface of the body. When the pulses are recorded, they form an electrocardiogram, which a doctor can study to determine how well the heart is working. The brain, too, sends out brain waves of electricity, which can be recorded in an electroencephalogram. The electric currents generated by most living cells are extremely small-often so small that sensitive instruments are needed to record them. But in some animals, certain muscled cells have become so specialized as electrical generators that they do not work as muscle cells at all. When large numbers of these cells are linked together, the effect can be astonishing.
¡¡¡¡The electric eel is an amazing living storage battery. It can send a jolt of as much as eight hundred volts of electricity through the water in which it lives. (An electric house current is only one hundred twenty volts.) As many as four-fifths of all the cells in the electric eel's body are specialized for generating electricity, and the strength of the shock it can deliver corresponds roughly to the length of its body.
?
16.What is the main idea of the passage? _________.
A. Electric eels are potentially dangerous一网一平台答案
B. Biology and electricity appear to be closely related
C. The modern age is an age of electricity.
D. Scientists still have much to discover about electricity国开形成性考核答案
´ð°¸:C
17.The author mentions all of the following as results of a blackout EXCEPT _________.?国家开放大学作业答案
A. refrigerated food item may go bad
B. traffic lights do not work
C. people must rely on candlelights
D. elevators and escalators do not function
´ð°¸:C
18.Why does the author mention electric eels? _________.
A. To warn the reader to stay away from them
B. To compare their voltage to that used in houses
C. To give an example of a living being generating great electricity
D. To describe a new source of electrical power
´ð°¸:C
19.How many volts of electricity can an electric eel emit? _________.
A. 1,000
B. 800
C. 200国家开放大学作业答案
D. 120
´ð°¸:B
国家开放大学作业答案
20.It can be inferred from the passage that the longer an eel is the _________.
A. more beneficial it will be to science
B. more powerful will be its electrical charge
C. easier it will be to find
D. tougher it will be to eat
´ð°¸:B一网一平台答案
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