I didn’t hear the bell ring; I asleep. A. must be B. must have been C. should be ——青夏教育精英家教网—

摘要： I didn’t hear the bell ring; I asleep. A. must be B. must have been C. should be D. should have been

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I didn’t hear the bell ring. I asleep.

A．must be B．must have been

C．should be D．should have been

I didn't hear the bell ring, I ________ asleep.

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