in doing her homework
spend + 时间 + in doing sth. 花费一段时间干某事
spend + 金钱 + on sth. 花费多少金钱在……
Alan spent two hours ( )(do one's homework)last night.
Alan spent two hours ( )(do one's homework)last night.
英语人气：981 ℃时间：2019-08-18 22:26:41
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