Tomhadtobetoldtwoorthreetimes________hecouldrememberwhattheteachers

发布时间:2020-08-04 12:50:56

Tom had to be told two or three times ________ he could remember what the teacher saidA.beforeB.whenC.untilD.As

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A解析A(解析:考查连词。before "到……为止;在……之前"when“当……时候"until"直到……为止”as“当……时候”,until强调动作的延续性,其中tell并非延续性动词,另根据句意“老师说两三遍之后汤姆才能记住。”因此选A。)
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