All the people in this company have been instructed _____ the survey they did yesterday.

题目

All the people in this company have been instructed _____ the survey they did yesterday.
A,return B.return's C.to return D.to return's 拜托说说原因,为什么选那个,

答案

选C
instruct sb to do sth.
变成被动语态是 sb.be instrrcted to do sth.
再变成完成时是 sb.have been instructed to do sth.