2013年自考《英语（二）》每日一练

单选题

1.They wrote a letter of thanks to ________ had helped them.

A.who

B.whom

C.whomever

D.whoever

正确答案：D

答案解析：whoever had helped them是介词to的宾语从句，whoever是这个从句的主语。whoever had helped them：任何帮助过他们的人。