题文
I ______ while reading the English textbook. Luckily, my roommate woke me up in time !
| A．had fallen asleep | B．have fallen asleep | C．fell asleep | D．fall asleep |
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I ______ while reading the English textbook. Luckily, my roommate woke me up in time !
| A．had fallen asleep | B．have fallen asleep | C．fell asleep | D．fall asleep |
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