题目内容
We can’t pass the exam, ______ we study hard
| A．because | B．unless |
| C．though | D．or |
B
解析试题分析：句意：除非我们努力学习，否则我们不会通过考试。A. because因为；B. unless除非；C. though虽然；D.or或者，根据题干分析此处是“除非”的意思，故选B。
考点：考查连词的用法
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