5．-Jack，go to the front door and have a look．Is the pizza man knocking at the door？
-It ____ be the pizza man，mum．We didn't order any lunch food．（　�。�
A．mustn'tB．won'tC．can'tD．shan't

分析 --Jack，到前面去看一看．是不是送披薩的人在敲門？
--不可能是送披薩的人，媽媽．我們沒有訂任何午餐的食物．

解答 答案是C．本題考查情態(tài)動詞的否定式；mustn't禁止，不允許；won't 不會，主語為sth時表示"無論怎樣也不"；can't 不可能；shan't，shall not 的否定式，將不會…；根據(jù)語境，因為沒有訂購任何午餐的食物，所以是否定推測"不可能"，can't用于否定句表示把握性很大的推測；故選C．

點評 要在正確理解情態(tài)動詞的基本含義的基礎上，整體理解語境中的情感態(tài)度，做出合理的判斷．

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