问题
选择题
You may keep the book for one more week _______no one else needs it.
A．provided that
B．so that
C．in order that
D．in case
答案
答案：A
考查连词用法。provided that=if如果；B以至于；C为了；D以防；句意：如果没有别人需要这本书，你可以多借一个星期。故A正确。
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