Question

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

A．though

B．while

C．until

D．because

Answer 1

C

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。