We'll have a picnic in the park this Sunday ________ it rains or it's very cold. A．since B．if C．unle...
2022-11-25 14:45:19 95次 2014年高考英语提升训练（10）动词时态及语态英语试卷（解析版） 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
本题链接：
