1. (2019九下·九龙坡模拟) 阅读下列材料，从A、B、C、D四个选项中选出最佳答案。

New Science and Technology

Look carefully before you cross

    The city of Daye in Hubei Province is using new technology to stop people from crossing against red lights. The city has set up special posts (杆) on its sidewalks. The posts can recognize (识别) human faces. If they catch a person crossing at a red light, they will send water drops at him or her.

High-tech building

    China not only builds things quickly, but also tries to use new and high technology. About twelve years has passed since the opening of the Qinghai-Tibet Railway. About 550 kilometers of the railroad runs over ice-covered earth. When the ice-covered earth gets warm during summer, it can make the railway move. Chinese scientists built special structures to solve this problem.

Musical road in Holland (荷兰)

    In a village of Holland, there is a musical road. With the help of something special, the road can play a song. But if a car drives at a speed of over 60 km/h, the sound will become noisy. The local government thinks it will encourage drivers to control the speed. They will have to slow down in order to hear the song instead of the noise.

1. （1） If you cross the street at a red light in Daye, you will be punished ________.

   A . by other people B . by water drops C . by the policeman D . by red lights
3. （2） Chinese scientists built special structures on the Qinghai-Tibet Railway to ________.

   A . let the train run over ice-covered earth during winter B . stop the ice-covered earth from getting warm during summer C . make things move quickly along the 550 kilometers' railway road D . stop the railway from moving over the warming earth during summer
5. （3） When you drive at a speed of about ________ on the musical road in Holland, you can hear a beautiful song.

   A . 50 km/h B . 70 km/h C . 80 km/h D . 100 km/h
7. （4） All the three kinds of new science and technology introduced here are about ________.

   A . food safety B . water safety C . road safety D . air safety