Do you know 5G? It is the fifth generation(代) of mobile network technology. These new networks are coming.

China just issued commercial licenses(发放商用牌照) for 5G on June 6th. This means that China’s telecom companies were soon able to offer 5G networks for mobile phone users.

Each mobile network generation is faster and more powerful than the one before it. 1G let us talk to each other. 2G let us send messages. 3G gave us data and the Internet. And 4G made all of these things faster. What’s special about 5G?

5G has a very short delay between sending and receiving information. Now, 4G takes about 100 to 200 milliseconds(毫秒) to send and receive data. But 5G will get it down to 1 millisecond or less.

This big change will not only make our mobile Internet faster, but also deeply change our lives. Read on to find out how.

5G + entertainment

5G networks are about 100 times faster than 4G. This means you can download a movie in seconds using 5G.

5G + transportation

5G will also bring us safer self-driving cars. These cars can send signals(信号) to each other. They also talk to traffic lights and road sensors(传感器). 5G will allow cars to react even faster than human drivers.

5G + smart homes

5G also makes the Internet of things possible. Internet of things is a large network that connects everything to the Internet. Smart homes are part of it.

For example, if the sensor feels the air becoming dry, a smart sprinkler(洒水器) could water your plants by itself.

【小题1】What happened on the sixth day of June according to the passage?

A．5G came into use.

B．China issued commercial licenses.

C．Mobile phone users could talk to each other.

D．4G received information more slowly than 3G.

【小题2】What does the underlined word “delay” in Paragraph 4 probably mean in Chinese?

A．延时

B．删除

C．断开

D．终止

【小题3】5G will change people’s lives in many ways EXCEPT _________.

A．entertainment

B．transportation

C．smart homes

D．health

【小题4】Which of the following is NOT true according to the passage?

A．5G can make human drivers react faster than cars.

B．We can download a movie faster with 5G.

C．The plants can be watered by a smart sprinkler itself with 5G.

D．5G is faster and more powerful than 4G.

【小题5】What’s the main idea of the passage?

A．Mobile phone users can use 5G networks.

B．Each mobile network generation has their own advantages.

C．5G will change our lives in many ways.

D．5G will bring us safer self-driving cars.