题目内容
– May I play basketball with my friends now?
– No, ______ you’ve finished your homework.
A. since B. if C. unless
C
解析试题分析: 句意：我可以现在和我的朋友踢足球吗？不行，除非你已经完成了作业。Since自从if如果unless
除非。完成作业是踢足球的条件故选C。
考点： 考查连词。
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