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【题目】1 think we'd better keep to the subject, ______we'll waste our time.

A.and B.or C.but D.so

【答案】B

【解析】

试题分析:考查并列句中的并列连词。A. 和;B. 否则,或者;C. 但是;D. 所以。句意:我想我们最好还是坚持这个主题,否则我们会浪费时间。这里前后两句话不是并列关系,也不是转折关系和因果关系,用or连接最合适,故选B

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