问题
选择题
—Look! Here comes our school bus.
—No hurry. Don't get on it ______ it has stopped. [ ]
A. until
B. after
C. since
D. when
答案
答案：A
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—Look! Here comes our school bus.
—No hurry. Don't get on it ______ it has stopped. [ ]
A. until
B. after
C. since
D. when
答案：A