Are you good at ____?A.to dance B.dancing 该选哪个,为什么?

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Are you good at ____?A.to dance B.dancing 该选哪个,为什么?
Are you good at ____?A.to dance B.dancing 该选哪个,为什么?

Are you good at ____?A.to dance B.dancing 该选哪个,为什么?
B
be good at sth/ doing sth.表示“在什么方面好”的意思

B 你舞跳得很好？

dancing

B
at是介词后接名词或动名词

选B
be good at doing sth. 某事做得好。at介词接介宾短语doing，不能用to do这样的不定式结构。

B at 是介词，后面用分词而不是不定时
be good at doing sth 固定搭配，擅长做某事

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