﹣Time is up．I have to go now．
﹣Oh，it s raining heavily outside．You'd better wait here_____it stops．（ ）
A．untilB．whileC．since
﹣Time is up．I have to go now．
﹣Oh，it s raining heavily outside．You'd better wait here_____it stops．（ ）
A．untilB．whileC．since
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