Look_______! The car is coming.

1. A.
   on
2. B.
   for
3. C.
   out
4. D.
   after

Look_______! The car is coming.

Hurry up.  The car is coming.
Wait a minute, Don’t cross the street _____the traffic lights are green.

Hurry up.  The car is coming.

Wait a minute, Don’t cross the street _____the traffic lights are green.

A．while             B．when             C．until             D．after