—It is rather cold here. Shall we light a fire?
—No, we ______because things are easy to catch fire.
A. won’t B. can’t C. mustn’t D. needn’t
It is said that his health ______ by years of hard working.
A. has been destroyed B. has destroyed C. is destroying D. had been destroyed
Does everyone know what to do if a fire ______?
A. is broken up B. breaks up C. is broken out D. breaks out
It is obvious _________ he has known the news and he is very satisfied with the result.
A. which B. that C. what D. whether
We _______ in the office.
A. are not permitted smoke B. are not permitted smoking
C. don’t permit smoking D. don’t permit to smoke
I’ll help you _______ I don’t sleep for night.
A. though B. although C. even if D. as if
