This is my tmin sister Lucy .Both she and I_good at drawing.A:am B:are.

问题描述:

This is my tmin sister Lucy .Both she and I_good at drawing.A:am B:are.
请问:选那一个,为什么?

当然选B啊!……
Both是复数,所以谓语动词用复数!
还有啊,应该是my twin sister吧,