My sister does well _ (选择)Computer Studies.A:on B:at C:in D:to

问题描述:

My sister does well _ (选择)Computer Studies.A:on B:at C:in D:to

C ,do well in 是词组,意为擅长...

in

选C.理由:这里do well in sth.是固定搭配,意为“在某方面做得很好”.