— Can you explain____________? —Maybe you don’t get enough sleep．
A. why do I always feel tired B. why I always feel tired
C. how much sleep do we need every day D. how much sleep we need every day
—Thank you for sharing your ideas． —___________．
A. It doesn’t matter B. It sounds great
C. Don’t mention it D. It depends
—I am getting weaker and weaker． —_____________?
A. Why not spend more time with your friends B. What about taking more exercise
C. Shall we write letters to each other D. Why don’t you eat less food
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
