30. --Lucy, let me help you fix your computer.

--__________. I can manage it myself.

A. That’s OK.　　　 B. No, thanks.　　　 C. Perhaps not　　　 D. Not at all.

29. --I’m sorry to have kept you waiting.

--Oh, not at all. I ______here for only a few minutes.

A. have been　　 B. had been　　 　　C. was　　 　　　D. will be

28. _______ interests me most in the world is the natural beauty of Guilin.

A. That　　　　 　B. Which　　　　 C. it　　　　 　　　　　　 　D. What

27.　I　don’t　think　______　possible　to　master　a　foreign　language　without　much　memory　work. 　　 A.　that　　　　　 　B.　which　　　　　 C.　it　　　　　　　　　 　D.　this

25. We believe scientists will ________a way to solve the problem of air pollution.

　 A. set off　　　 B. put off　　　 　C. come up with　　　 D. catch up with

26　______　for　some　time　after　a　tiring　day　is　very　enjoyable　and　exciting　for　me　in　summer.

A　Swim　　　　 　B.　Swimming　　 　C.　Go　swimming　　 D.　To　swim

24.　His　wife　______　his　children　was　invited　to　the　party. 　　 A.　and　　　　 　B.　or　　　　　 　C.　as　well　as　　 　　　D.　but　also

23. --What’s the matter _______Mike? He is wet through.

--His car ran _______the river.

A. with, into　　 B. for, in　　　 　C. with, to　　　 　　D. to, at