Are there ________ cars on the street at night?

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　　Are there ________ cars on the street at night?

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This is a street crossing. There are red and green lights at each corner（拐角）. 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 red lights change to green. Then they can go on. 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（或者） red. But they must wait until（直到）the green light is shining if they want to turn left.

Some people are color-blind(色盲) , they can not see the difference between red and green. These people must not drive, or there will be an accident. We must keep our street safe.

76. Drivers must pay attention to(注意) ______ at each corner of the street crossing.

A. the red light                      B. the green light

C. all kinds of lights                D. the red and green light

77. No one should drive on when_______.

A. the green light shows         B. the red light shows

C. there is a light                    D. the light changes

78. A car can turn right when there is _________.

A. a green light or a red one        B. not only（不但）a green light but also(而且) a red one

C. a green light and not a red one    D. no green light or red one

79. A car can’t make a left turn ______ the green light shines.

A. when                    B. because                    C. if                      D. until（直到）

80. Something may happen to a color-blind man if he_______

A. arrives                 B. walks                C. drives            D. runs

A sign is another kind of language. Here are some of them that you can see on the roads.

Number One is a sign with the number forty on it. When driver see this sign, they must not go at more than forty kilometers one hour. We see this sign when we are getting near a town. Number Two is a sign that we’re near a crossing. We must drive carefully. Number Three is a sign that there is a bend (弯道) on the road. Again, we must drive slowly and carefully. It is not safe to go round a bend very fast. Number Four is a sign that there is another road coming in from the right. There is a junction(交叉点) at this place.
Number Five is a sign that there is a dangerous mountain road and Number Six is a sign that the road gets narrow. Drivers must go slowly and carefully when they see these signs. Number Seven is a sign that there is a school at the side of the street or the road. Perhaps there are children going to or leaving school. So drivers must look carefully and go slowly. Number Eight is a sign with a letter “P” on it. The letter “P” means “Parking”. At some places, there are signs “NO PARKING” or “NO WAITING”. If a driver leaves his car near one of these signs, a policeman may come and write down the number of his car.
【小题1】. At the place where you see Sign 1, ________.