—The old man is ill. He ________ to the hospital at once. --Don’t worry. A doct

题型：不详难度：来源：

—The old man is ill. He ________ to the hospital at once.
--Don’t worry. A doctor _________to come already.

A．must be sent , has asked

B．must send, have asked

C．must be sent, has been asked

D．must send, have been asked

答案

C

解析

试题分析：句意：---这个老人生病了他必须马上被送到医院，----不要担心，医生已经被叫来了。 Must be done 表示含情态动词的被动语态，完成时的被动语态have been done 结构，根据题意可知选C