We found ________ necessary to protect the environment.

　　A. it B. this C. that D. what

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

　　A. Either B. Neither C. Both D. All

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

 Lucy knew nothing about it ________ her sister told her.

　　A. because B. until C. if D. since

 He walked ________ fast for us ________catch up with.

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

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

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

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

　　A. but B. and C. or D. when

Tom has been in the factory _________he left school.

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

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

　　A. so B. such C. as D. or

________the new computer, travellers at the offices of CAAC can now buy their air tickets much faster. A. Because B. Thanks for C. Thanks to D. Since