It is essential that these application forms ________ back as early as possible.A.must be sent B.It is essential that these application forms ________ back as early as possible.A.must be sentB.will be sentC.are sentD.be sent这题选啥啊?
问题描述:
It is essential that these application forms ________ back as early as possible.A.must be sent B.
It is essential that these application forms ________ back as early as possible.
A.must be sent
B.will be sent
C.are sent
D.be sent
这题选啥啊?
答
d
should be sent省略should