You _____be careful with the camera. It costs!
A .must B. may
C. can D. will
I ______ have worried before I came to the new school, for my classmates here are very friendly to me.
A. mightn’t B. mustn’t
C. needn’t D. couldn’t
You ____ be Carol. You haven’t changed a bit after all these years.
A. must B. can
C. will D. shall
Without his wartime experiences, Hemingway____ his famous novel A Farewell to Arms.
A. didn’t write B. hadn’t written
C. wouldn’t write D. wouldn’t have written
—Can’t you stay a little longer?
—It’s getting late. I really _____go now, My daughter is home alone.
A .may B .can
C . must D .dare
Had the governments and scientists not worked together , AIDS-related deaths _______ since their highest in 2005.
A. had not fallen B. would not fall
C. did not fall D. would not have fallen
