20.My mother loves pop music,________ my father loves classical music.

A.when　　　　　　 B. as　　　　　 C. while　　　　 D.and

19.The problem is easy for her and she has no________.

A.difficulty to solve　　　　　 B.difficulty solving

C.difficulties to solve　　　　 D.diffculties solving

18.-What did the teacher say?I didn't quite follow her.

-She asked us whether we______ to America next fall.

A.went　　　　 B.had been　　　 C.will go　　　 D.would go

17.The teacher asked us _________.

A.what problems did we have　　　 B.what problems we had

C.what problems do we have　　　　 D.what problems we were

16.The teacher asked us___ so much noise.

A.don't　 make　　 B.not make　　　 C.not making　　 D.not to make

15.-How did it _____ that you make so many mistakes in your homework?

-I myself haven't figured out yet.

e about　　 B.occur to　　　 C.bring about　　 D.get down

14.You don't need to ask,just_________.

A.make yourself at hmoe　　　　 B.make yourself home

C.make you at home　　　　　　　 D.be at home

13.The little boy________ down and _______ to his parents that his legs were hurt.

A.lied,lied　　　　　　　　　　 B.lay,lied　　

C.lay,laid　　　　　　　　　　　 D.laid,lay

12.Let's have a rest,The _____ work makes me very _____.

A.tired,tiring　　　　　　　　　 B.tiring;tiring

C.tired,tired　　　　　　　　　 D.tiring,tired

11.-I forgot to take an umbrella when I went out.

-_______________.

A.So did I　　 B.So I did　　　 C.I so did　　 D.So do I