You are not supposed to get off the bus it stops.A. though B. whileC. until D. because

问题补充：

You are not supposed to get off the bus it stops.

A. though

B. while

C. until

D. because

答案：

A. though

B. while

(答案→)C. until

D. because

解析：连词辨析。though 虽然，尽管；while然而，当……时；until 直到；because因为。句意：直到它停下来，你才能应该下车。not···until 表示直到···才，故选C，符合题意。