题目内容
The message is very important, so it is supposed ______ as soon as possible.
A. to be sent B. to send C. being sent D. sending
A考查非谓语动词。首先,固定句型be supposed to do sth.确定后接不定式短语作真正主语;第二,The message与send的关系为被动。故答案为A. to be sent。
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