I don’t want to make friends with those people think of themselves first when in trouble.

问题补充：

I don’t want to make friends with those people think of themselves first when in trouble.

A. who

B. which

C. those

D. Whom

答案：

(答案→)A. who

B. which

C. those

D. Whom

解析：考查定语从句中的关系代词。这里代指人用that 或who，故选A。