【題目】--- Look! Mr. Lee is standing under the tree.

--- It______ him. He has gone to Canada for his holiday.

A. must be B. mustn’t be

C. can be D. can’t be

【答案】D

【解析】

試題分析：句意：—看！李先生正站在樹下。——不可能是他。他去加拿大度假了。情態(tài)動詞可以表推測，must表示肯定的推測，翻譯成“一定是”；can’t表示否定的推測，翻譯成“不可能是”，依據(jù)句意理解，答案為D。

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