knows the truth will tell you about it I think .A. WhoB. No matter whoC. WhoeverD. B a

问题补充：

knows the truth will tell you about it , I think .

A. Who

B. No matter who

C. Whoever

D. B and C

答案：

A. Who

B. No matter who

(答案→)C. Whoever

D. B and C

解析：主语从句只能用Whoever引导。