If I ____ plan to do anything I wanted to ,I'd like to go to Tibet and travel through as much of it as possible.
A. would
B. could
C. had to
D. ought to
You____ to attend the meeting, but you didn't.
A. should come
B. would have come
C. came
D. should have come
Can you imagine how____ about it ?No, I can't.
A. could they know possibly
B. could they possibly know
C. they could possibly know
D. possibly they could know
Why is it so dark, There____ be a heavy rain coming.
A. shall
B. may
C. should
D. will
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