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    You buy a gift, but you can if you want to. A. must B. mustn't C. have to D. don't have to 答案:D 考点:情态动词 解析:don’t have to 意为“没有必要 .符合语境.句意为:“你没有必要买礼物.但如果你 想买的话.你也可以买. 【查看更多】

     

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    （2010·湖南桃源一中高三10月月考）   23. How can you expect to pass the Oral Test of PETS _________you never dare to practice in public?

    A. in case         B. even if              C. unless                D. if

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