—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
This morning I had hardly got to my school when it_____ to rain.
A. had begun B. was beginning C. began D. begins
