to learn a foreign language well is useful,I think(改为同义句)I think it useful to learn a foreign language well .这里的第二句话中为什么用it而不是it's

分类: 作业答案 • 2021-12-19 16:25:34

问题描述：

to learn a foreign language well is useful,I think(改为同义句)
I think it useful to learn a foreign language well .
这里的第二句话中为什么用it而不是it's

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