--- We'll visit the Summer Palace_______ there is a heavy rain tomorrow. --- OK ! Boating on the lak...
2023-02-04 17:46:44 41次 2013-2014学年江苏省太仓市九年级5月学科教学质量调研英语试卷（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 visit the Summer Palace_______ there is a heavy rain tomorrow.
--- OK ! Boating on the lake must be interesting.
A. unless B. since C. until D. if
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