We'll have a picnic in the park this Sunday ________ it rains or it's very cold. A.since B.if C.unle...
2022-07-16 11:53:52 61次 天津市2019-2020学年高二11月四校联考英语试卷 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
We'll have a picnic in the park this Sunday ________ it rains or it's very cold.
A.since B.if C.unless D.until
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