题目内容：

    Your Internet experience is ruined when the net speed is too slow — it takes so long to open a web page and the reality shows you’re watching stops every few minutes. That can be very annoying.

But it could be a thing of the past. On June 3, the Ministry of Industry and Information Technology announced that China’s major telecom carriers(电信公司) would start to provide 5G services.

1 What is 5G?

The “G” in “5G” refers to the generation of mobile network technologies. 1G let us talk to each other, 2G let us send messages, 3G gave us mobile data and the Internet, and 4G made all of these things faster.

Now 5G promises much faster data download and upload speeds, and more stable connections. This means that you will be able to download an entire HD movie in seconds and only experience a short delay(延迟) between sending and receiving data.

2 What changes will 5G bring us?

With a 5G network, the short delay in information exchange will allow driverless cars to run more safely. Meanwhile, 5G-enabled wearable devices(设备) will be of great use in hospitals. Besides, VR games will become more popular with 5G. The short delay of 5G will make the games feel even more real.

3What are the disadvantages of 5G?

According to the BBC, __________, it will not be perfect.

For one thing, 5G will not“travel” far. On 4G networks, you can be 10 kilometers away from the nearest transmission base and hardly lose signal(信号). But 5G will only cover about 300 meters. And in order to use 5G, we will have to buy new products especially designed for 5G that are expensive at present. All in all, there is still much to be done before 5G’s popularization.

1.“G” in “5G” refers to ___________.

A.the speed of the Internet B.the generation of the technology

C.the delay in information exchange D.the game on the smart phone

2.According to the passage, the best sentence for the blank is __________.

A.because it is quite expensive to get 5G products

B.5G has its own advantages and disadvantages

C.until hundreds of millions of Internet users use 5G

D.though 5G will make our lives more convenient

3.Which of the following is NOT true according to the passage?

A.2G let users send messages through phones. B.3G gave us mobile data and the Internet.

C.4G will make VR games more real and popular. D.5G will be used in the medical field.

4.What is the main idea of the passage?

A.An introduction of 5G. B.Changes 5G brings us.

C.The progress of technology. D.Disadvantages of 5G.