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    He must be helping the old man to water the flowers, ? A. is he B. isn’t he C. must he D. mustn’t he [答案]B [解析]考查反意疑问句.陈述句中的谓语中虽有情态动词must.但此处must表示对正在进行的动作进行推测.将其不看作情态动词.而must后有助动词be.故反意疑问句根据助动词be来构成.选B. 【查看更多】

     

    题目列表(包括答案和解析)

    He must be helping the old man to water the flowers,______ ?      

    A. is he    B. isn’t he     C. must he     D. mustn’t he

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    He must be helping the old man to water the flowers,______ ?      

    A. is he     B. isn’t he     C. must he     D. mustn’t he

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     He must be helping the old man to water the flowers,     ?       A. is he     B. isn’t he     C. must he     D. mustn’t he

     

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    He must be helping the old man to water the flowers,______ ?      
    A. is he     B. isn’t he     C. must he     D. mustn’t he

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    He must be helping the old man to water the flowers, ________?
    [     ]
    A. is he  
    B. isn't he
    C. must he  
    D. mustn't he

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