◎ 题干
—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
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“—The old man is ill. He ________ to the hospital at once.--Don’t worry. A doctor _________to come already.A.must be sent , has askedB.must send, have askedC…”主要考查了你对  【助动词】【介词短语】【固定搭配】【疑问词组】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。