--Hurry up! The bus is coming.--Wait a minute. Don’t cross the streetthe traffic lights ar

问题补充：

--Hurry up! The bus is coming.

--Wait a minute. Don’t cross the streetthe traffic lights are green.

A. until

B. after

C. while

D. since

答案：

(答案→)A. until

B. after

C. while

D. since

解析：until直到；after在……之后；while然而，当……时；since由于，自从……以来。句意：快点，公交车来了。——等一下，到绿灯亮时，再过街。结合语境可知选A。