l think it is high time we strict measures to stop pollution.
A. will take
B. take
C. took
D. havetaken
It is requested that every student_________a paper on air pollution.
A. writes
B. wrote
C. writing
D. write
l insisted that all the students________to smoke at school.
A. not be allowed
B. not allow
C. were not allowed
D. not should be allowed
Without his encouragement, I______________the confidence to finish it at all.
A. would have
B. wouldn't have
C. would have had
D. wouldn't have had
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