【題目】Study hard _____ you will fail the final exam.

A. and B. or C. but

【答案】B

【解析】試題分析：句意：努力學(xué)習(xí)否則你就會(huì)考試不及格。and，那么，or，否定；but，但是。根據(jù)句意，故選B。

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