You’d better choose someone you thinkkind and friendly to help you.A. whom; to beB. who; i

问题补充：

You’d better choose someone you thinkkind 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：这题考查定语从句和主谓一致，先行词是someone，定语从句中you think是插入语，所以从句没有主语，用who引导定语从句，定语从句的谓语和先行词一致，就是someone，不定代词，用单数谓语。选B。