like sports and are outgoing.A. Both of themB. Both theyC. They are bothD. They both are

问题补充：

like sports and are outgoing.

A. Both of them

B. Both they

C. They are both

D. They both are

答案：

(答案→)A. Both of them

B. Both they

C. They are both

D. They both are

解析：句意:他们都喜欢运动,乐于助人.结合语境可知本句缺少主语,both不能用作形容词修饰代词,本句中both用作代词,做主语,故选A.