Belly, you should ____________（trust or be confident）in yourself. It is the first step to success.
It is a ____________（秘密）between you and me. Don't let others know it.
She was so ____________（瞌睡的）that she went to bed early last night.
The bird can ____________（飞）in the sky because it has two wings.
COVID-19（新冠病毒）has stopped people from working for several months. In recent days, many people have returned to work. 1. Here is some advice.
When commuting（通勤）
Avoid taking public transport. 2. If you have to take public transport, you shall wear a face mask（口罩）through the ride and try to avoid touching objects in the vehicles（车辆）with your hands.
Entering the workplace
Wear a face mask and receive body temperature check before entering the office building. You must pass the body temperature check before being allowed in. 3. If you have signs such as fever, please go to the fever office of a hospital at once.
Using a lift
Avoid using the lift if you are going to or leaving lower floors. Use the stairs instead. Stand clear of lift doors while waiting. 4.
In offices
5. Do it three times a day for 15 minutes to half an hour each time. You can only get infected（感染的）if the virus builds up in large numbers. Fresh air can stop the virus from building up.
Keep healthy habits such as eating a healthy diet, exercising and getting enough sleep. They can improve your immunity（免疫力）.
A.Try to walk, cycle or drive to your office instead.
B.What steps of prevention（预防）and control are needed?
C.Do not stand face to face with people while waiting.
D.Open windows to let fresh air in during the day.
E.Wash hands in time.
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 6, 2019. This means that China's telecom companies will be 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（数据）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 is almost real-time.
'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（娱乐）
5G networks are about 100 times faster than 4G. This means you can download a movie in seconds using 5G.
Also, virtual reality（VR）games will become more popular with 5G. The short delay of 5G will make the games feel even more real.
5G + transport
5C 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（反应）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, your toaster can automatically（自动地）start making breakfast after your alarm rings. And if its sensor feels the air becoming dry, a smart sprinkler（洒水器）could water your plants by itself.
1.What's the writer's purpose in writing the third paragraph?
A.To explain 5G is the best of all.
B.To share his knowledge about 5G.
C.To encourage people to use the new network technology.
D.To show the development of mobile network technology.
2.What does the underlined word “delay” in paragraph 4 mean in Chinese?
A.卡顿 B.延时 C.暂停 D.掉线
3.Which of the following ways is not mentioned that 5G will change people's lives?
A.Health care B.Entertainment. C.Transport. D.Smart homes.
4.What will people do possibly with 5G according to the passage?
A.Download a movie in minutes.
B.Put everything onto the Internet.
C.Make self-driving cars safer.
D.Make food more easily and faster.
5.What's the main idea of the passage?
A.5G will change our lives in many ways.
B.Mobile networks are changing for better.
C.5G will make the Internet of things possible.
D.5G networks for mobile phone users are coming.
