. It is important to know exactly the me
题型：选择题
问题：
. It is important to know exactly the message ________ and ________.
A．you want to send it to people; that you try to get them to do
B．sent to people; what do they want to do
C．you want to send; which you want people to know
D．you want to send to people; what you are trying to get them to do