ENGLISH Learn:41.We shall ask for samples _________ and then we can make our decision.

问题描述:

ENGLISH Learn:41.We shall ask for samples _________ and then we can make our decision.
A.to be sent B.being sent C.to send D.to have been sent

句式不完整,应该加上 to us
不过硬选择就选择 A,即:to be sent to us