Many students are good at _____(play) basketball.

问题描述:

Many students are good at _____(play) basketball.

playing
因为at 是介词,后面必须跟名词,play 这个动词就要加ing 变成动名词

playing

playing
be good at doing 擅长做某事

为你解答。
Many students are good at (playing) basketball.
很多学生擅长打篮球。
解释:be good at doing,擅长做某事。