问题描述:
当妈妈进屋时,汤姆假装在睡觉.When mom came in,Tom _ _ be sleep
当妈妈进屋时,汤姆假装在睡觉.
When mom came in,Tom _ _ be sleeping.
当妈妈进屋时,汤姆假装在睡觉.
When mom came in,Tom _ _ be sleeping.
问题解答:
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