B. Choose the best words and complete the passage (选择最恰当的单词完成短文)

You might have noticed that sometimes, when you’re playing mobile games or taking a video call, the picture suddenly freezes because the network speed is too ________. When you try to download a movie on your phone, it seems to take forever.

These annoying things will soon become a thing of the ________, as China just issued commercial licenses (发放商用牌照) for 5G networks on June 6, 2019. This means that China’s telecommunications (电信) companies will be able to offer 5G network speeds for mobile phone users.

The “G” in “5G” ________ generation (of mobile network technology). 1G let us talk to each other. 2G let us send messages. 3G gave us mobile data and internet, and 4G made all of these things faster. So what will 5G bring?

First of all, 5G is so fast that it will allow you to download an entire HD movie in seconds. The delay between sending and receiving data will be shortened. Now 4G takes about 100 to 200 milliseconds (毫秒), while humans have a reaction time of about 200 to 300 milliseconds. But 5G will get the delay down to 1 millisecond or less, which is almost real-time.

Because of this ________ in speed, it will be possible to create and use new kinds of technology. Robots will be used to do operations because doctors will be able to control them from somewhere else without any delay. Self-driving cars will be able to run more ________ because they can smoothly communicate with each other, traffic lights and road sensors (传感器).

5G also makes the internet of things (IoT, 物联网) possible. IoT is a large network that connects nearly everything. ________, your toaster might be able to automatically start making your breakfast after your alarm clock rings.

All in all, 5G will shape every type of technology that it touches. And you won’t have to wait too long for that to happen.

1.A.small B.low C.fast D.high

2.A.present B.future C.past D.old

3.A.goes to B.looks like C.relies on D.stands for

4.A.increase B.competition C.delay D.practice

5.A.widely B.slowly C.carefully D.safely

6.A.At last B.In addition C.For example D.In other words

There is a new rule (规定) for students. They need to run 1,500 metres each day. How do they like the new rule ? Are they ready to run?

Wang Tao: I’m 12 years old. I’m from Beijing. As Grade 8 students, we usually run 50 metres,200 metres or 400 metres in PE class, but never 1,500 metres. But I think the new rule is a good idea. It can help us keep fit. Running can also make us active (活跃的) in the daytime.

Liu Tao: I’m 13 years old. I ’m from Dalian. Many students worry about the new rule. We only run 400 metres in PE class. Some students say that they may feel tired and sleepy in class after running. But I am OK with it. I can run 1,000 metres in 3 minutes.

Shi Ming: I’m 14 years old. I’m from Qingdao. Students in our school run 600 metres in Grade 7 and 800 metres in Grade 8 in PE class. In winter, we run about four laps (圈) each day. That is close to 1,500 metres. I think it’s good for us.

1.Which of the following doesn’t Wang Tao run in PE class?

A. 50 metres. B. 200 metres. C. 400 metres. D. 1,500 metres.

2.Wang Tao thinks running can make students .

A. healthy and active B. beautiful and healthy

C. strong and active D. tall and strong

3.What does the underlined word “sleepy ” mean (意思是) in Chinese?

A. 兴奋的 B. 健康的 C. 开心的 D. 困倦的

4.Which of the following is TRUE(正确的) according to the passage ?

A. Wang Tao is a Grade 7 student.

B. Shi Ming runs about 1,000 metres each day in winter.

C. Wang Tao and Liu Tao live in different cities.

D. Shi Ming runs 800 metres in Grade 7 in PE class.

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