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 –MayIhaveanapple,Mum?       --Certainly.Butyou

練習題1.9W

問題詳情:

 –MayIhaveanapple,Mum?       --Certainly.Butyou

 – May I have an apple, Mum?

        --Certainly. But you ______ wash your hands first?

        A. may           B. must            C. can           D. need

【回答】

B

知識點:情態動詞

題型:選擇題