You have failed two tests.You’d better start working harder,_______ you won’t pa
题型：不详难度：来源：
| You have failed two tests.You’d better start working harder,_______ you won’t pass the course. |
答案
| D |
解析
| or作并列连词,意为“否则,要不然”。根据句意可判断出表示“你最好开始更加努力工作,否则你将通不过这门课程”。故选D项。and意为“及,和,与,同，又,兼”,表示并列或对称关系。so 作并列连词,意为“因而,所以,那么,这样看来”。but作并列连词,可以连接两个并列成分或两个并列分句,意为“但是,然而”。 |
举一反三
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We had to wait half an hour _______ we had already booked a table.| A．since | B．although | C．until | D．before |
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----Won’t you go shopping with your mother ?
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A When B If C Unless D Whether |
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