题目
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
可圈可点用户
2021-03-25 13:18
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答案
D
解析
should be sent省略should
可圈可点用户
2021-03-25 18:18