问题
选择题
—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
答案
答案：D
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—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
答案：D