Students from other schools can’t borrow books in our library ______they fill in an application card...
2022-05-28 08:09:15 103次 2020年上海市崇明区九年级质量监控（二模）英语试卷 单选题 反馈错误 加入收藏 正确率 : 100%
题目内容：
Students from other schools can’t borrow books in our library ______they fill in an application card.
A.if B.unless C.now that D.as soon as
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