【同步练习题】

1. Mum will be back from work _______ half an hour.

A. in B. after C. later D. before

2. ______ the money for protecting wildlife _____ now?

A. Is; being collecting B. Are, collected C. Is, being collected D. Has, collected

3. The old machine _____ our difficulty to finish the work on time.

A. adds up to B. has added C. adding to D. added to

4. ______ home alone after 12:00 in the evening.

A. Do you dare go B. Dare you go C. Dare you to go D. If you dare go

5. He spent what he had _______ a cell phone.

A. bought B. to buy C. buying D. had bought

6. Although they’ve never met, they _____ by e-mail for years.

A. stay in touch with B. get in touch with C. keep in touch D. get in touch

7. Never give up, ______ great difficulty is.

A. whatever B. whoever C. however D. whenever

8. _______ danger, you may call 120 for help.

A. In case B. In case of C. When D. If

9. Mr White is one of the foreign experts who ______ in China.

A. works B. is working C. has been working D. are working

10. The secretary reminded me _____ there was a meeting that afternoon.

A. of B. about C. that D. on

答案与简析：

1. A in + 一段时间常与将来时态连用，after + 一段时间或一段时间 + later多用于过去时态。

2. C 本题考查现在进行时态的被动语态结构is/am/are being done，D选项的正确形式应为has been collected。

3. D “这台旧机器增加了我们按时完工的难度。”add to意为“增加”，在句中作谓语，add up

to意为“共计”，add…to表“把……加在……里”。

4. B句中dare作情态动词, 其后接动词原形; 若作实义动词, 答案为Do you dare to go. D选项不能构成疑问句。

5. C “他倾其所有买了一手机。”本题考查短语spend…(in) doing/on sth.

6. C stay/ keep in touch (with sb.)意为“保持联系”;get in touch(with sb.)意为“取得联系”。 get为瞬间动词，不能与for years 连用。

7. C “无论困难有多大，永远不要放弃”。本题的考查目标为no matter how引导的让步状语从句，此时no matter how = however，修饰形容词或副词。

8. B in case of 接名词，其余选项接句子。

9. D 本题考查定语从句中的主谓一致。先行词为experts，谓语动词用复数。

10. C 本题考查remind的用法。that后接句子，其余选项接名词或代词。

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