Question

4．擅长做…．be good at．

Answer 1

分析 be good at

解答 答案：be good at．表示擅长用短语be good at，后加名词代词或者动名词，故答案是be good at．

点评 be good at 后面要接名词、动名词或名词/动名词短语，
请看例句：

John is good at swimming and basketball
It is important that we try to be good at everything we do
I have a shrill voice．I'll never be good at singing．
I am good at chess，but not checkers．