作业帮Jack can( ) (swim) well.he is good at ( ) (swim)
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Jack can( ) (swim) well.he is good at ( ) (swim)
Jack can( ) (swim) well.he is good at ( ) (swim)
Jack can( ) (swim) well.he is good at ( ) (swim)
这两个应该是 swim swimming
Jack can(swim ) (swim) well.he is good at ( swimming) (swim)