21. —Do you like rock music, Ann?

—        . It’s too noisy to me.

A. I like it very much .                              B. I don’t get very excited about it.

C. I don’t know much about it .                 D. It’s my favourite.

22. Could you drive me to the supermarket at noon if         ?

A. it’s convenient of you               B. you are convenient

C. it’s convenient to you                                    D. you will be convenient

23. It is in Shanghai,       you paid a visit to in 2000,       this kind of computer is produced.

A. where; that   B. which; that     C. that; that      D. which; when