This is a street crossing. There are red and green lights at each corner. Drivers must watch the lights carefully.
When there is a green light, the car may go on. When there is a red light, the cars must stop. They must wait until the red light changes to green. Then they can go on. Sometime the cars want to make a right turn or a left turn. They can make a right turn when the light is green or red . But they must wait until the green light is shining if they want to turn left.
Some people are color-blind(色盲).they cannot see the difference between red and green. These people must not drive, or else will be accidents().We must keep our streets safe. (Choose the best answer)
1． Drives must watch carefully at each corner
A green lights B red lights C both green and red lights D orange lights
2. When there is a red light
A the car must stop B the car may go on
C the cars may make a left turn D the cars may make a right or left turn
3.Cars can make a right turn when
A there is a red light B there is a green light
C there is a red or green light D there is no light
4. The color-blind people may have accidents because
A they are blind B they can’t see the lights
C they can’t see the difference between the red and green lights
D they can’t hear cars
5. must not drive.
A people that are deaf B people that are blind
C people that are color-blind D both B and C