摘要: 向左转:turn left 向右转:turn right 掉头:turn around

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  Many people have to do their own things every day. Some of them ride bikes and some of them drive cars, so streets look very busy.

  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 cars may go on. When there is a red light, the cars must stop. They must wait until the light changes to green. Then they can go. Sometimes 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.

  But some people are color-blind(色盲). They can't tell the difference between red and green. These people must not drive. We must keep our streets safe.

(1) The streets look busy because ________.

[  ]

A.there are so many people and cars or bikes

B.the streets are not wide enough

C.many people like traveling

D.the streets are fewer than before

(2) Drivers must see ________ clearly at a corner of the street crossing.

[  ]

A.the people and bikes

B.the old and young people

C.the green light and the red light

D.the students who are going to school

(3) Cars can't go ________.

[  ]

A.when the green light shows
B.when the red light shows
C.when there is no light
D.when the light changes

(4) A car can turn right when ________.

[  ]

A.there is a green or red light

B.there is only a green light

C.there is only a red light

D.there is no way

(5) If someone is a color-blind, he ________.

[  ]

A.can drive cars
B.can see the green color clearly
C.can't go to streets
D.can't be a driver
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