We must show concern each other. A. withB. forC. atD. to

问题补充：

We must show concern each other.

A. with

B. for

C. at

D. to

答案：

(答案→)A. with

B. for

C. at

D. to

解析：concern with: v. 使关心;be concerned with 牵涉到，与...有关，参与

concern about + sth. or sb. 对…的关心/忧虑;concern for + sb. 对…的关心/忧虑