there no gravity, there would be no human beings on the earth. A．If B．If was C．If not D．Were 题目和参考答案——青夏教育精英家教网—

题目内容

____ there no gravity, there would be no human beings on the earth.
A．If 　B．If was C．If not　　D．Were

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相关题目

单词拼写(共10小题；每小题l分，共10分)

1. The a_____________ (应用)of the new technology has greatly increased the production.

2. Scientists in some countries have done a lot of work to e_____________ the moon.

3. My family’s health and ____________ (安全)are of the most importance to me.

4. There are ten of us here, ___________ (包括)three girls.

5. She got a cold. But after one week’s rest and care, the cold would not affect her p___________ in the match.

6. His g___________ (目标)is to study hard, get a good job and support his family.

7. There was u___________ (全体一致的)agreement on this problem, so the meeting was over earlier than planned.

8. No pains, no g_________.

9. The _______ (起源)of the Halloween dates back 2000 years ago to the Celtic celebration of the dead.

10. In Christian countries Easter is celebrated as a ___________(宗教的) holiday.

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
Have you ever wondered why birds sing?   1  After all, you probably sing or whistle when you are happy.
Some scientists believe that birds do sing some of the time just because they are happy.
  2  Their singing is actually a warning to other birds to stay out of their territory. Do you know what a "territory" is? A territory is an area that an animal, usually the male, claims(声称) as its won. Only he and his family are welcome there. No other families of the same species are welcome. Your yard and house are your territory where only your family and friends are welcome. If a stranger should enter your territory and threaten you, you might shout. 3  If so, you have actually scared the stranger away without having to fight him. 4 But he expects an outsider almost all the time, especially at nesting(筑巢) season. So he is screaming all the time, whether he can see an outsider or not. This screaming is what we call a bird' s song, and it is usually enough to keep an outsider away.
Birds sing loudest in the spring when they are trying to attract a mate and warn others not to enter the territory of theirs.
   5  Most of it has to do with attracting males and setting up territories.

A．A bird does the same thing.

B．Maybe you thought that they were just happy.

C．Shouting loudly is just like a bird's screaming.

D．You can see that birds have a language all their own.

E. Probably this would be enough to frighten him away.
F. However they sing most of the time for a very different reason.
G. So, just like human beings, birds sing for almost the same reasons.

单词拼写(共10小题；每小题l分，共10分)
1. The a_____________ (应用)of the new technology has greatly increased the production.
2. Scientists in some countries have done a lot of work to e_____________ the moon.
3. My family’s health and ____________ (安全)are of the most importance to me.
4. There are ten of us here, ___________ (包括)three girls.
5. She got a cold. But after one week’s rest and care, the cold would not affect her p___________ in the match.
6. His g___________ (目标)is to study hard, get a good job and support his family.
7. There was u___________ (全体一致的)agreement on this problem, so the meeting was over earlier than planned.
8. No pains, no g_________.
9. The _______ (起源)of the Halloween dates back 2000 years ago to the Celtic celebration of the dead.
10. In Christian countries Easter is celebrated as a ___________(宗教的) holiday.

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

1 All the teenagers we chose said they had computers at home. We asked them how much time they spent on their computers in an average week, but we were most interested in what they used their computers for. The average time spent on a computer in a week was about 12 hours, with the highest user averaging 32 hours and the lowest user only 5 hours. 2 3 Fourteen teenagers told us they did some word processing at home, but not very much. Only 2 of them said that computers helped them with their studies, while 8 of them told us they kept addresses and telephone numbers on their computers or used them as diaries. Only 3 of them said they were learning to program computers, and nobody looked up information (other than their address lists). 4

The results indicate quite clearly that computers are seen by most young people as little more than game machines. 5 It seems to us that, although computers are common in the homes of teenagers, they have not yet become useful tools in everyday life.

A．There no big difference between boys and girls.

B．All of the teenagers questioned said they regularly used to play games.

C．We questioned thirty young people between 14 and 18.

D．But some adults admitted that they had no computers at home.

E. None of them used their computers for any other purpose.

F. I don’t know how important a computer is for teenagers.

G. The other important users are for word processing and organizing address lists.

—Ambulance(急救）,please. —Ambulance.________1.

—I'm in a phone box outside No. 30,Nanjing road. _____________2.

—There，s been an accident. A man has been run over. He ’ s losing a lot of blood. Please send an ambulance at once. —Is there a doctor there?

—No, there' s only me. The driver didn't stop__________. 3.

—Yes. Don' t move the patient.____________ 4. Keep the patient warm, but don ’ t give him anything to eat or drink. OK?

—Right, please urryt

—Don ’ t worry. ______5.

A．What‘ s the trouble,sir?

B．What can we do for you?

C．Is there anything I can do?

D．Where are you calling from?

E. Try to stop bleeding.

F. Where is the patient?

G. The ambulance is on its way now.

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