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12.________ is quite natural,a beginner can't read the books written in English very quickly.

A. Which　　　　　　 B. As　　　　 C. What　　　 D. It

11. -Do you regret paying 500 dollars for your necklace?

--No, I would gladly pay__________ for it.

A. two times as much　　　　　　　　 B. twice as many

C. twice as much　　　　　　　　　　 D. as twice as much

10. __________ it rain, the crops_____________.

A. Shall,would be saved　　　　　　　 B. Should, would be saved

C. Would, should be safe　　　　　　 D. Were, might be safe

9. --You forgot your keys when you left home in the morning.

--Good heavens,___________.

A. so did I.　　 B. so I did.　 C. so you did.　 D. so did you.

8. It is impossible for____________ little room.

A. so, such　　 B. so, so　　　 C. such a, so　 D. such, such

7. This new-type machine____________　 little room.

A. takes up　　　 B. is taken up　　 C. has been taken up　 　D. is taking up

6. --You don't look so well, Mary. What's the matter with you?--Why?___________.

A. I'm quite myself　　　 B. Fine, think you　　 C. I felt bad　　　　　　 D. I'm not myself

5. China has hundreds of islands, ___________ is Taiwan Island.

A. among them the largest　　　　　　 B. and the largest of which

C. and the largest of them　　　　　　 D. but in which the largest

4. You must have waited here for a long time ,___________you?

A. mustn't　 　B. didn't　　　　 C. haven't　　　 D. hadn't

3. Nearly________ of the surface of our planet is covered by water.

A. seven-ten　 B. seven-tenth　 C. seven-tenths　 D. seventh-ten