A.What are

B.Which of

C.Which are

D.What

[答案]B

8[.单选题]I knew him better,I discovered that my impression had been right.

A.Which

B.As

C.Until

D.Unless

[答案]B

9[.单选题]The heavy snow could not keep usgoing out to work.

A.from

B.on

C.upon

D.up

[答案]A

10[.单选题]They found the lecture hard.

A.to be understood

B.to understand

C.for understanding

D.to have been understood

[答案]B

11[.单选题]I learned how toa bicycle when I was six years old.

A.drive

B.ride

C.pull

D.draw

[答案]B

12[.单选题]by the air， the kite went up into the sky。

A. Pushing

B. Pushed

C. Having been pushed

D. Having pushed

[答案]B