3. 我可以请你帮忙把灯打开吗？ （favour, switch）

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4. 两个人谈话，彼此所站的距离，随文化不同而不同。(vary)

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5. 请允许我提议为我们的友谊干杯。(toast)

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三、语法训练

1. So long as we study with strong will, we can answer the question hard it is .

A. whichever B. how C. whatever D. however

2. If I free tomorrow, I'll go to the cinema with you.

A. am B. will be C. shall be D. have been

3. Turn the switch anything goes wrong with the machine.

A. so B. when C. unless D. because

4. , he is very good at numbers.

A. As he is a small boy B. A small boy he is

C. A small boy as he is D. Small boy as he is

5. hard I tried, I still couldn't manage it.

A. No matter B. However C. Although D. Though

6. We young people should go the Party wants us to .

A. no matter where B. to the place C. to any place D. wherever

7. Take an umbrella with you it should rain.

A. in no case B. in the case C. in case of D. in case

8. I wrote down his name and address I should forget it.

A. in order that B. for fear that C. so that D. since

9. They went on doing their experiments they had failed many times.

A. unless B. until C. though D. as long as

10. how hard I pushed, the door stayed closed.

A. Even if B. Since C. Though D. No matter

11. Dark it was, we continued our way.

A. because B. since C. as D. that

12. No matter the conditions were like, we think that a car should be driven as fast as it could .

A. what B. how C. which D. when

13. John may phone tonight. I don't want to go out he phones.

A. as long as B. in order to C. in case D. so that

14. most of the earth's surface is covered by water, fresh water is very rare and precious.

A. As B. Once C. If D. Although

15. , Carolina couldn't get the door open.

A. Try as she might B. As she might try C. She might as try D. Might she as try