He is working hard for fear that he ________ .
A. fell behind
B. may fall behind
C. should fall behind
D. would fall behind
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If they _______ the contract ahead of time, they could not have missed the plan.
A. signed
B. had signed
C. would have signed
D. should sign
But for the snow, we _______ earlier.
A. will arrive
B. would arrive
C. could arrive
D. should have arrived
If you _____ that movie last night, you wouldn't be so sleepy.
A. didn't see
B. hadn't seen
C. haven't seen
D. wouldn't see
--Did you say something rude to her becase of what she’d done?-- yes, but I ______ so.
A. had better not do
B. would rather not do
C. oughtn't to do
D. shouldn't have done
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