A
If you will be cycling, you will need to know what these traffic signs and signals mean.
A sign like this one means that there is a bike lane（道）. If there is a bike lane, you are required to use it. If there is not a bike lane, you should ride with traffic as far to the right side of the road as possible.
When the signal light turns green, cars go. When you cross the street at a signal light, you should wait for the walk signal. Be sure to look carefully to the left, right and left again, before crossing the street.
When the signal light turns yellow, car drivers should slow down and prepare to stop. You should not cross if the light is yellow. The light is about to turn red, and cars will enter the intersection(十字路口).
This signal is the WALK sign. It has a picture of a person walking instead of using the word WALK.
This signal is the DON’T WALK sign. It is part of the signal with the picture of a person walking. This is a picture of a red hand, meaning you should stop. You should wait to cross the street until the green picture of the person walking is showing.
Car drivers and bikers must come to a complete stop at STOP signs.
A yield sign means to slow down and be ready to stop. If there are pedestrians（行人）or vehicles in or nearing the intersection, you must stop. If there is no traffic in or nearing the intersection and it is safe, you may go through.
This sign means you are coming to a crosswalk. Car drivers and bikers must stop to allow people in the crosswalk to cross the street.
21．The passage is intended for .
A．car drivers B．skaters
C．bikers D．pedestrians
22．If you see the sign 
while riding a bike, you are required to .
A．take the bike lane B．stop your bike
C．ride close to the right side of the road D．ride in the middle of the road
23．Which of the following signs has the same meaning as the sign
?
A．
B．
C．
D．
24．When the signal light turns yellow, cyclists .
A．can cross the road B．should walk across the road
C．should wait D．can enter the intersection
