A.traffic policing
B.policy route
C.flow mirroring
D.traffic statistics
If you are at a crossing where the traffic has green light, you should ______.
A.make sure that drives have enough time to give way to you
B.cross the road in the same direction as the traffic
C.wait until there is a traffic hold-up
D.wait until the light for the traffic changes to red
There is ______ traffic on the streets after the rush hour.
A.none
B.fewer
C.less
D.few
In winter, traffic accidents occur ______ on the highway.
A.frequently
B.suddenly
C.usually
D.rapidly
(If) traffic problems are not solved soon, (driving) (in) cities (becomes) impossible.
A.If
B.driving
C.in
D.becomes
The driver kept one eye on ____ traffic and the other on ____ map.
A.不填;a
B.a;a
C.the;the
D.the;不填
Five years ago, John Smith was once involved ______ a traffic accident.
A.at
B.by
C.in
D.on