Our teachers often tell us we can’t be _________ because no mistake is too small for us.
A. very careful B. careful C. so careful D. too careful
Wars are disasters. A large number of people will lose their homes if a war _______.
A. breaks out B. is broken out C. breaks up D. is broken up
I never doubt _________ his advice is of great value to me．
A. that B. whether C. how D. what
As the New Year is coming, we have ____________ preparation work to do.
A. a great deal of B. a great deal
C. a number of D. the number of
_____ Jim_____ his cousin has been to America, but both of them know the country well．
A. Not only, but also B. Both, and C. Neither, nor D. Either, or
— When did you go to bed last night?
— ____________ I finished my homework.
A. Until B. Not until C. When D. While
