There is no doubt the earth is becoming warmer.
A.whether | B.that | C.if | D.why |
You _____ such a serious mistake if you had followed his advice.
A.may not make | B.might not make |
C.shouldn’t have made | D.might not have made |
If only I _____ my watch!
A.hadn’t lost | B.haven’t lost | C.didn’t lost | D.don’t lose |
What should we do if it _____ tomorrow?
A.should snow | B.would snow | C.snow | D.will snow |
--- “What will you do during the summer holiday?”
--- “I don’t know, but it’s high time _____ something.”
A.I’m deciding | B.I’ll decide | C.I decided | D.I decide |
I’m glad I went over all my notes; otherwise _____ .
A.I may have failed | B.I’d fail |
C.I’d have failed | D.I’ll have failed |