问题描述：
the chikdren went home from the grammar school,their lessons_____ for the day.答案填finish...
the chikdren went home from the grammar school,their lessons_____ for the day.答案填finished,为什么不能填had finished?
the chikdren went home from the grammar school,their lessons_____ for the day.答案填finished,为什么不能填had finished?
问题解答：
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