题目

根据语境从方框中选择恰当的情态动词填空，每词限用一次must, can, needn't, mustn't, have to （1） — I come in?—Yes, please. （2） We should be quiet in the theatre. Wespeak loudly. （3） —Must I return this book to the library today, Mrs Brown?—No, you （4） —Must I stay with you, Grandpa?—No, you don'tYou can go swimming with your friends. （5） Webe careful when we cross the road. 答案： 【1】Can 【1】mustn't 【1】needn't 【1】have to 【1】must

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