Who saw it ______ at that time?
A. happen B. happened C. happen
s
D. to happen
More and more people have realized that we won’t have cleaner water to drink unless something _______soon.
A. is done B. was done C. will be done D. to be done
We have to ____the sports meeting till next Friday because of the bad weather
A. put up B. put away C. put on D. put off
They are talking about the movie __they watched yesterday
A./ B. whose C. what D. whom
_____interesting work it is to teach children！
A. How B. What C. What an D. How an
.---I want to know if your son will go to the zoo. If your son does, so __________.
--- Well, he is glad to be there.
A.does B.he does C.will mine D.does mine
