问题补充:
The message is very important , so it is supposed as soon as possible .
A. sending
B. to send
C. being sent
D. to be sent
答案:
A. sending
B. to send
C. being sent
(答案→)D. to be sent
解析::考查固定结构和语态。Be supposed to do sth应该做某事;根据句意是被动语态。句意:这个信息非常重要,所以应该立刻被送出去。故D正确。