They must have been enjoying themselves there, or they so long. A. can’t have st
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They must have been enjoying themselves there, or they _____ so long.
A. can’t have stayed B. wouldn’t have stayed
C. needn’t have stayed D. couldn’t stay
试题答案
B
句意：他们一定在那里过得很愉快，否则，他们就不会呆那么久了。