—Will you stay for some more days?
—Sorry, I_____. My mother called to ask me to go back at once.
A. mustn’t B. may not C. can’t D. wouldn’t
—Why didn’t you go to play football with us yesterday afternoon?
—I _____my mother with the housework then.
A. helped B. was helping C. had helped D. have been helping
We can easily become unhappy_____ we work out our problems in our daily life.
A. after B. if C. until D. unless
I’ ll never forget the day_____ the great scientist came to our school and gave us a speech.
A. that B. which C. when D. where
Last year was a hard time to my friend Jim, but he didn’t_____ hope.
A. pick up B. use up C. put up D. give up
_____you do, don’t miss this exhibition, for it’s so hard for me to get the tickets.
A. Whatever B. However C. Whenever D. Whether
