29.( 　　) The weather in Beijing is cooler than ________ in Guangzhou.

　　　　　 A. this　　　　 B. it　　　　　　 C. that　　　　　 D. one

28. We found ________ necessary to protect the environment.

　　　　　 A. it　　　　　 B. this　　　　 C. that　　　　 D. what

27.--Which would you like, rice or noodles? --_______is OK. I'm hungry.

A. Either　　　　 B. Neither　　　　 C. Both　　　　　 D. All

26. I don't think it very expensive to buy a family computer here.

　　　　 -- Really? I'll buy _______ next week.

A. it　　　　　　 B. this　　　　 C. one　　 　　D. mine

25. Lucy knew nothing about it ________ her sister told her.

　　　　　 A. because　　　 B. until　　　　　 C. if　　　　　　 D. since

24. He walked ________ fast for us ________catch up with.

　　　　　 A. so, that　　　 B. such, that　　 C. enough, to　　 D. too, to

23. _______ my mother ________ my sister watches TV plays these days.

　　　 A. Either, nor　 B. Both, and　　 C. Neither, or　　 D. Neither, nor

22.(　　 ) The nurse doesn't feel well today, _________ she still works very hard.

　　　 A. but　　　　　 B. and　　　　　 C. or　　　　　　 D. when

21.(　　 ) Tom has been in the factory _________he left school.

　　　 A. when　　　　 B. since　　　　　 C. as soon as　　　 D. whether

20.(　　 ) He had _________ much work to do that he couldn't go out.

　　　 A. so　　　　　 B. such　　　　　 C. as　　　　　　 D. or