问题
选择题
—It's 10 o'clock now. I must go.
—It's raining heavily outside. Don't leave ______ it stops. [ ]
A. since
B. until
C. when
D. because
答案
答案：B
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—It's 10 o'clock now. I must go.
—It's raining heavily outside. Don't leave ______ it stops. [ ]
A. since
B. until
C. when
D. because
答案：B
