摘要： I asleep because it took me a long time to realize that the telephone was ringing. A. could have fallen B. should have fallen C. must have fallen D. mustn't have fallen
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I ________ asleep because it took me a long time to realize that the telephone was ringing.
A. could fall B. need have fallen C. must have fallen D. may fall
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I____ asleep because it took me a long time to realize that the telephone was ringing.
A. could have fallen B. should have fallen
C. must have fallen D. mustn’t have fallen
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I ________ asleep because it took me a long time to realize that the telephone was ringing.
- A.could fall
- B.need have fallen
- C.must have fallen
- D.may fall