Don’t get off the bus it has stopped.A. afterB. whenC. ifD. until

问题补充：

Don’t get off the bus it has stopped.

A. after

B. when

C. if

D. until

答案：

A. after

B. when

C. if

(答案→)D. until

解析：本题考查连词。After在……之后，when当……时，if如果，until直到。句意：直到公共汽车停下来，你才能下车。not····until 为直到····才。故选D。