3．如图在Rt△ABC中，∠C=90°∠B=30°，AB=2，

　 则AC=　　 。

2．=　　　　 　。

1．在实数 ，，　 　， ， 　中是　　　　　 无理数 。

15、- My brother enjoys swimming very much.

- So does ________.

A. yours　　 B. he　　 C. mine　　　 D. him

14、They elected him ______ monitor of their class for ______ second time.

A. /; a　　 B. the; /　 C. a; /　　 D. a; the

13、- Would you go to the cinema or stay at home?

- ________ the film is good, I ‘ll stay at home.

A. No matter what　　　　　　 B. In spite of

C. Even if　　　　　　　　　　　 D. As though

12、- What do you think of the concert?

- I really enjoyed it. I didn’t expect it was ________ wonderful.

A. as　 B. more　　　 C. most　　　　 D. very

11、Though he has got well, he still looks _______ weak.

A. fairly　 B. rather　　 C. much　　 D.too

10、The old lady can’t hope to _______ her cold in a few days.

A. get away　 B. get off　　 C. get out　　 D. get over

9、- What will you do during Christmas vacation?

- I don’t know, but it’s about time _______ something.

A. I’m deciding　　 B. I’ll decide　 C. I’d decide　 D. I decided