______ you return those books to the library immediately you will have to pay a fine.

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问题 ______ you return those books to the library immediately you will have to pay a fine.

选项 A、Until
B、Unless
C、If
D、Provided

答案B

解析本题测试连词的用法。本句的意思是：“除非你立刻把书归还图书馆，否则你会被罚款。”until：直到；unless：除非；if：如果； provided：假若。

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成人本科学位英语

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