You’d better choose someone you think kind and friendly to help you.A. whom; to be B. who

问题补充：

You’d better choose someone you think kind and friendly to help you.

A. whom; to be

B. who; is

C. that; is

D. which; to be

答案：

A. whom; to be

(答案→)B. who; is

C. that; is

D. which; to be

解析：you think是插入成份。定语从句缺作主语的人及be动词。