be good at 后面加什么

　　What helps you to be good at sport?

　　是什么讓你擅長運(yùn)動(dòng)？

　　I just want to be good at something.

　　我只是想有一項(xiàng)專長。

　　You must be good at learning at first.

　　你必須首先擅長學(xué)習(xí)。