11.No one doubts( )he is the best leader in the company.

A.whether

B.if

C.what

D.that

答案：D

12.But from the start of their experiments， the Wright brothers found that they needed money to pay ( ) their research.

A.back

B.down

C.for

D.off

答案：C

13.Frequently single-parent children ( ) some of the functions that the absent adult in the house would have served.

A.take off

B.take after

C.take in

D.take on

答案：D

14.We had to ( ) a lot of noise when the children were at home.

A.go in for

B.hold on to

C.put up with

D.keep pace with

答案：C

15.The paint is still wet. ( )!

A.Be not sure to touch it

B.Be sure not to touch it

C.Be sure to not touch it

D.Don't be sure to touch it

答案：B

16.He ( ) a sum of money every week for his old age.

A.sets up

B.sets out

C.sets against

D.sets aside

答案：D

17.I am disappointed with the new officers elected in our club， but there is no point ( ) about it.

A.to worry

B.in worrying

C.for us worrying

D.with us to worry

答案：B

18.When you become frightened， many physical changes occur within your body. Your heartbeat and responses quicken; your pupils dilate(扩大) and ( ) more light.

A.permit

B.allow

C.admit

D.let

答案：C

19.I think it a good chance that some foreigners will( )some Chinese during the Beijing Olympics.

A.pick out

B.pick up

C.give up

D.give out

答案：B

20.Could you please( )a really elegant solution to our problem if you don't like what I have to say?

A.put up with

B.come up with

C.added up with

D.made up for

答案：B