We shall ask for samples ____ and then we can make our decision.A_英语解答

We shall ask for samples ____ and then we can make our decision.
A. to be sentB. being sentC. to sent D. to have been sent

人气：249 ℃　时间：2019-10-19 12:37:05

解答

A.to be sent 标本是要被送来的,所以要用不定式(表将来)的被动语态.