You should care your friends when they are in a difficult situation. They need your love.

问题补充：

You should care your friends when they are in a difficult situation. They need your love.

A. on

B. about

C. to

D. in

答案：

A. on

(答案→)B. about

C. to

D. in

解析：句意：你应该关心你的朋友当他们处于困难境遇中时。他们需要你的爱。care about,关心，故选B。