18．-Is Jack on duty today？
-It ________ be him．It's his turn tomorrow．（　�。�
A．mustn'tB．won'tC．can'tD．needn't

分析 --今天杰克值日嗎？
--不可能是他值日．明天才輪到他．

解答 答案：C．
mustn't禁止，不許；won't，將不會(huì)；can't不可能；needn't不必．根據(jù)"It's his turn tomorrow"可知今天不可能是他值日；mustn't表"禁止"，常譯為"不許"，不能表推測(cè)，can't不可能．故選C．

點(diǎn)評(píng) 本題考查情態(tài)動(dòng)詞，要掌握情態(tài)動(dòng)詞的用法并結(jié)合具體的語(yǔ)境選擇出正確的選項(xiàng)．

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科目：高中英語(yǔ) 來(lái)源： 題型：閱讀理解

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科目：高中英語(yǔ) 來(lái)源： 題型：閱讀理解

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