I'm good at basketball.A.play B.plays C.playing D.to playI'm good at basketball.A.play B.plays C.playing D.to play I'm good at basketball.A.play B.plays C.playing D.to play 呵呵、、、、请给出为什么选这个答案

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I'm good at basketball.A.play B.plays C.playing D.to play
I'm good at basketball.
A.play B.plays C.playing D.to play
I'm good at basketball.
A.play B.plays C.playing D.to play
呵呵、、、、请给出为什么选这个答案的理由、、、、

选C,因为at是介词,介词后只能接动词的ing或者名词

c be good at doing 常用的句式

C,at是介词后只接动词的ing

c