题目内容
1. ―Hurry up! The bus is coming.
-Wait a minute. Don't cross the street _________ the traffic light is green.
A. after B. until C. while D. since
B
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题目内容
1. ―Hurry up! The bus is coming.
-Wait a minute. Don't cross the street _________ the traffic light is green.
A. after B. until C. while D. since
B