―Hurry up. The bus is coming ―Wait a moment. Don’t cross the street the traffic lights are

问题补充：

―Hurry up. The bus is coming,

―Wait a moment. Don’t cross the street the traffic lights are green.

A. after

B. until

C. while

D. since

答案：

A. after

(答案→)B. until

C. while

D. since

解析：句意：快点。公交车来了。等一下， 直到交通灯变成绿色再穿过马路。not … until直到…才，故选B