你题中的do是多余的
填的是doing
finish doing sth 表示做完某事
你写完作业就可以踢足球
finish to do sth.
表示做完一件事后接着做其他事
本题就一件事,所以不用这个结构
If you finish__________do your homework,you can play football
If you finish__________do your homework,you can play football
英语人气：968 ℃时间：2019-07-29 19:34:33
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