Question

Don't get off the bus ________ it has stopped.

1. A.
   until
2. B.
   if
3. C.
   to
4. D.
   for

Answer 1

A
本题考查“not... until...”结构，意思是“直到……才……”。本题的意思是：直到车停下来，才可以下车。排除B、C、D三项。故选A。