| 阅读理解。 | ||||
| ||||
| 1. The volunteers can ______ in the community. | ||||
| A. clean up the houses B. build a house for the homeless C. look after pet animals D. help the people who are poor | ||||
| 2. Biosphere Expedition is likely to be held ______. | ||||
| A. for three months B. in the summer holiday C. only by local scientists D. between America and China | ||||
| 3. If Wu Dong is ______ years old, he can be a volunteer to help the little kids. | ||||
| A. 11 B. 13 C. 15 D. 17 | ||||
| 4. Which of the following is TRUE? | ||||
| A. The volunteer should create green areas for all the families. B. To join the holiday volunteer work, special skills are required. C. The volunteer can choose any service activity in the community. D. The student who doesn't study at school can be a volunteer to help the little kids. | ||||
| 5. What is the best tide for this passage? | ||||
| A. A Job Interview B. Volunteers Wanted C. Education Service D. An Expedition Club |
阅读理解。
Do you know why you sleep? You may think it's because you're tired. Or perhaps you've been told sleep
is good for you. Yet no one knows exactly why or how people sleep.
Until the early 1950s, most scientists thought the body and brain rested during sleep. Then a scientist
watched people sleep. He noticed that during periods of between 5 and 30 minutes, sleepers' eyes made
rapid movements, as if they were watching something. He called these periods REM (Rapid Eye Movement)
sleep. He called periods when sleeper's eyes did not move non-REM sleep.
Whenever the scientist woke people during REM sleep, they were having vivid dreams. Measurements
showed that sleepers' pulses (脉搏) went up quickly during REM sleep. Their breathing, heartbeat, and the
blood going to the brain also increased. Far from being a time of rest, sleep is a time when the body is hard
at work. Scientists still don't know the reason for this. Some believe REM sleep makes learning easier.
Babies spend a lot of time on REM sleep. Because of this, some scientists believe that REM sleep helps
the brain grow. Others think REM sleep is a time for the brain to empty the day's garbage.
One thing all the scientists agree on is that sleep is necessary. Without enough sleep, people make
mistakes. Most car accidents happen during the early morning hours, when people are sleepiest.
1. During REM sleep, a person's breathing and heartbeat ______.
A. stop
B. sleep
C. increase
D. stay the same
B. sleep
C. increase
D. stay the same
2. The underlined word "vivid" means ______.
A. easier
B. large
C. empty
D. clear anti lively
B. large
C. empty
D. clear anti lively
3. ______ tells what happens when people don't get enough sleep.
A. Paragraph 1
B. Paragraph 2
C. Paragraph 3
D. Paragraph 4
B. Paragraph 2
C. Paragraph 3
D. Paragraph 4
4. The main idea of this passage is ______.
A. that REM sleep can help the brain grow
B. about the scientific research of REM sleep
C. about how to empty the day's garbage
D. that our body is good at work when sleeping
B. about the scientific research of REM sleep
C. about how to empty the day's garbage
D. that our body is good at work when sleeping
5. We can know from the passage that _______.
A. enough sleep is very important to people
B. young people can experience REM sleep
C. the speed of sleepers' pulses will slow down during the REM sleep
D. all scientists have the same opinion on REM sleep
B. young people can experience REM sleep
C. the speed of sleepers' pulses will slow down during the REM sleep
D. all scientists have the same opinion on REM sleep
| 完形填空。 | ||||
| People in Quiet Town are very sad that their old friend, Time River, is facing the end of its life next October. The river 1 a lot to the people in the town. They all grow up and live with it all their lives. In the old times, people in the town 2 their houses on both sides of the river. The houses in each block shared a public washing room. On Mondays, people came and washed their clothes together there. They hung their clothes at the back of each house. Those clothes with different colors 3 a beautiful picture along the river. Now Time River is going to be filled in to make more land to build on. People are happy that they 4 . more living space. But at the same time, they feel sorry that they must say good-bye to their old friend. So they have decided to give a party one day a year to remember the river. hung (原形为 hang)悬挂 | ||||
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| 完形填空。 | ||||
| Many scientists say that the world is getting hotter and hotter. If they are right, the ice at the North and South Pole will melt eventually. If this happens, the sea will 1 and may cover most 2 all of Singapore. This will force everybody to move to a 3 country. We know that the sun 4 the earth. The heat from the sun hits the 5 , and some of 6 goes back into the sky. However, factories and cars 7 a lot of carbon dioxide (二氧化碳). When the gas rises into the sky, the heat from the sun can come 8 them but the heat from the ground cannot. It 9 near us in the sky and makes the 10 hotter and hotter every year. Scientists call this the "greenhouse effect" because a greenhouse is a small glass 11 which is hot inside. It is used for 12 plants in cool countries. Many countries are 13 about the greenhouse effect. They are trying to stop factories and cars from sending 14 gases into the sky. Scientists are not sure when the world will get much hotter. Some people say that the greenhouse effect has 15 already and has begun to affect the world's weather. | ||||
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