You may keep the book a further week ________ no one else requires it.
You may keep the book a further week ________ no one else requires it.
A、as if
B、even if
C、even though
D、provided that
【正确答案】:D
【题目解析】:provided that 假如;条件是;as if 犹如,好似;even if 即使,虽然;句意:这本书你可以再借一个星期,______没有人要。A 符合题意,翻译为:这本书你可以再借一个星期,假如没有人要的话。

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