题目内容
We can’t do well in examination _________ we study hard in school time.
| A．if | B．and | C．since | D．unless |
D
解析试题分析：根据题干，本句的意思是“除非我们在校努力学习，否则我们不能在考试中取得好的成绩。”unless是“除非，如果…不”的意思。其他词if“如果”，and“和”，since“自从”都不符合题意。所以本题选D。
考点：本题考查连词。
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