问题补充:
-Is Mr. Li in his office ?
-No, he in the office. He’s ill in hospital.
A. must be
B. can’t be
C. should be
D. needn’t be
答案:
A. must be
(答案→)B. can’t be
C. should be
D. needn’t be
解析:根据He’s ill in hospital “他生病住院了。”可知,本句应该是“他不可能在办公室。”故排除AC;“不可能”是can’t。而needn’t表示“不必”,与题意不符。所以本题选B。
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