there is a boy standing on the tree 可以改成there is a boy to stand on the tree 那么如果改成there is a boy to be standing on the tree可以吗
2022-02-08 00:16:20 21次 反馈错误 加入收藏 正确率 : 100%
题目内容：
there is a boy standing on the tree 可以改成there is a boy to stand on the tree
那么如果改成there is a boy to be standing on the tree可以吗
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