阅读下面短文，请从方框中选出适当的句子填入文中的适当位置，使

问题阅读理解

阅读下面短文，请从方框中选出适当的句子填入文中的适当位置，使短文内容完整正确。

       This is a street crossing.  1   Drivers must watch the lights carefully.
          2    When there is a red light, the cars going straight must stop. They must wait until the red light
changes to green.  3   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.
         4   They can't see the difference between red and green. These people must not drive, or else there will be accidents.  5

We must keep our streets safe.
There are red and gree,n lights at each corner.
Then they can go on.
When there is a green light, the cars may go on.
Some people are color-blind(色盲).

答案

1. There are red and green lights at each comer.

2. When there is a green light, the cars may go on.

3. Then they can go on.

4. Some people are color-blind.

5. We must keep our streets safe.