题目内容
You’ll fail the exam _____ you work hard.
| A．if | B．unless | C．or | D．so |
B
解析试题分析：句意：除非你努力学习，不然你考试会失败。A如果；B除非；C不然，或者；D所以，结合语境选B。
考点：考查连词。
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