—It’s 9 o’clock now. I must go.—It’s raining outside. Don’t leave it stops.A. whenB. since

—It’s 9 o’clock now. I must go.
—It’s raining outside. Don’t leave it stops.
A. when
B. since
C. while
D. until

A. whenB. sinceC. while(答案→)D. until解析：句意：现在是九点。我必须走了。外面在下雨。等雨停了再走。When当……的时候； since自从；while当……的时候； until直到，常用于句型not…until，所以选D.

我也是这个答案