Question

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

A．though

B．while

C．until

D．because

Answer 1

C

連詞辨析。though 雖然，盡管；while然而，當……時；until 直到；because因為。句意：直到它停下來，你才能應該下車。not···until 表示直到···才，故選C，符合題意。