---Is Jack on duty today?

    ---It ________ be him. It's his turn tomorrow.

      A. mustn't         B. won't            C. can't            D. needn't

 

【答案】

 C

【分析】根據(jù)題意,回答應(yīng)該是“不可能是他”。在情態(tài)動詞表推測時,must不能用于否定句,will是有肯定含義(That’ll be the doctor now 現(xiàn)在準(zhǔn)是醫(yī)生來了。此時約等于must)D。含義不對

【高考考點(diǎn)】情態(tài)動詞表推測

【易錯點(diǎn)】:B. 是很多同學(xué)容題犯的一個錯誤。

【備考提示】:情態(tài)動詞是每年的考點(diǎn)之一,也是學(xué)習(xí)的重點(diǎn)和難點(diǎn)。學(xué)習(xí)情態(tài)動詞的最佳方法就是記住他們的含義、區(qū)別與聯(lián)系。在解題的時候要正確理解句子含義,正確把握說話人的語氣和態(tài)度。

 

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