He looked as if he ______ the answer. [ ]A. knew B. had known C. knows D. ha

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He looked as if he ______ the answer.

[ ]

A. knew
B. had known
C. knows
D. has known

答案

举一反三

— What do you think we do now?
— I think it is time that you _____ down to something.

[ ]

A. will get
B. get
C. got
D. would get

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If we ____ the other road, we might have arrived here in time for the meeting.

[ ]

A. take
B. had taken
C. took
D. have taken

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— The weather has been very hot and dry.
— Yes. If it had rained even a drop, things would be much better now! And my vegetables _____.

[ ]

A. wouldn"t die
B. didn‘t die
C. hadn’t died
D. wouldn‘t have died

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Had I known about this computer program, a huge amount of time and energy _____.

[ ]

A. would have been saved
B. had been saved
C. will be saved
D. was saved

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Without water it ______ impossible to live on the earth.

[ ]

A. is
B. would
C. were
D. would be

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