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.
I had the meanest（最刻薄的）mother in the world. While other kids ate candy for breakfast, I had to have cereal（谷类食物）and eggs. When others had Coke and candy for lunch, I had to eat a sandwich. But at least I wasn't alone. My sister and two brothers had the same mean mother as I did.
My mother knew where we were at all times. She knew who our friends were.
We had to wear clean clothes and take a bath every day. The other kids got to wear the same clothes days.
We had to be in bed by 9:00 pm and up at 8:00 am. We couldn't sleep till noon like our friends. So while they slept, our mother gave us work to do. We had to wash dishes, make beds and learn to cook. I am sure she lay awake at night thinking up mean things to do to us.
Through the years, things didn't improve a bit. We could not lie in bed “sick” like our friends did in order to miss school.
My mother was the meanest mother. Out of four children, a couple of us went on to higher education. None of us have ever done bad things. She forced us to grow up into educated and honest people. I am trying to raise my children like this. I will feel proud when my children call me mean, because, you see, I am so glad I had the meanest mother in the whole world.
1.What does the underlined sentence “But at least I wasn't alone” in paragraph 1 mean?
A.The writer's mother was only mean to her.
B.The writer's sister and brothers were mean to her as well.
C.The writer's mother was also mean to her sister and brothers.
2.The writer was not allowed to ____________ as a child.
A.eat as much candy as she wanted
B.go to bed and get up at fixed times
C.change clothes or take a shower every day
3.The writer's mother was hard on her children because she wanted them ____________.
A.to receive a high education
B.to become mean people like her
C.to be educated and honest people
4.How does the writer feel about her mother now?
A.Regretful. B.Thankful. C.Worried.
5.What's the best title for the text?
A.Life with My Mean Mom
B.A Strict Mom and Her Family
C.How to Raise Good Children
Services > Using your Card
Library Cards are free to all people in California. They allow you to borrow books, magazines, CDs, and DVDs from our library. They also allow you to use the computers at the library.
Click here to apply for（申请）a Card.
★You must show your photo ID in person at the library.
★You must come to the library to receive a Card or change an expired（到期的）Card yourself. Library Cards expire after four years.
★You can always update（更新）your address, phone number and email online.
★Tell us immediately if your Card is lost or stolen.
Cards for kids and teens
The signature（签名）of a parent is needed for children（aged 13 and under）. The parent must also provide a photo ID. Teens（aged 14 to 17）use the process（流程）. However, teens who already have their own photo ID can apply without a parent's signature.
Borrowing materials（材料）
A Library Card allows you to borrow 25 things at most. You can keep each borrowed thing for more than 60 days.
If things are not returned in 60 days, you should pay for them. The fine for books and magazines is $1.00 each per day. The fine for CDs and DVDs is $2.00 each per day.
1.Where can you probably find the passage?
A.In a magazine. B.On a website. C.In a story book.
2.You don't have to go to the library when you want to ____________.
A.receive a Card B.borrow a magazine C.update your information
3.If you receive your Library Card on July 21, 2020, when will the Card be out-of-date?
A.On November 21, 2020. B.On July 21, 2023. C.On July 21, 2024.
4.If you are over 17 years old, what do you need to apply for a Card?
A.Your own photo ID. B.The Card of your parent. C.Your parent's signature.
5.If you fail to return the borrowed CDs within 60 days, how much should you pay for them every day?
A.$1.00 each. B.$2.00 each. C.$3.00 each.
My parents used to tell me how important school was for me, but I didn't think so. I paid little attention. But one thing let me _______ realize what my parents meant.
One day, when I walked past a mobile phone store, I saw it was hiring（雇用）new workers! I went into the shop and asked for the job. The manager looked at me for a few seconds _______ . “Do you have a high school diploma (文凭)?” He said, “Or do you have any _______ experience?” I felt so ashamed（羞愧的）and I just turned around and left.
I could not fall asleep that night, and I thought a lot about my _______ . “I must go to school to _______ my study because I can't do anything without a good education,” I said to myself silently.
Everything looked _______ when I went back to the store years later: the same people and the same design. However, compared with last time, I felt more _______ . The manager told me they needed new workers. I showed my diploma to the manager. He looked at it and said: “Great! You are _______ . ”
Education helps you have a bright future. Now I am not worried about my future because I'm still _______ in my spare time.
1.A.finally B.easily C.luckily D.fast
2.A.in a hurry B.from head to foot C.sooner or later D.from time to time
3.A.learning B.life C.teaching D.work
4.A.parents B.friends C.future D.study
5.A.continue B.begin C.stop D.change
6.A.the same B.different C.friendly D.fresh
7.A.excited B.surprised C.confident D.happy
8.A.out B.in C.up D.down
9.A.working B.driving C.running D.learning
Do you like exercising in the sun? How much sunlight do you get every day? How much time do you spend in the _______ ? As we all know，enough sunlight is good for our health. It gives us strong bones（骨骼）and good eyesight. It makes us happy and sleep better. Now scientists find out that it can even make you _______ .
Scientists did tests on mice. They give mice lots of sunlight. After that，the mice _______ a special thing named glutamic acid（谷氨酸）in their bodies. Glutamic acid does many things for our body. It can improve some of our abilities such as learning and remembering things.
It is OK to enjoy some sunlight for about an hour every day. But you should be _______ because it is summer now. The sun is very strong around noon. Keep yourself away from the sun around the noon, or it may _______ your skin（皮肤）. It is best to enjoy sunlight in the morning or before sunset.
Why not go out and enjoy the _______ with your family or your best friends? I'm sure you can be smarter soon.
1.A.moon B.sun C.night
2.A.smarter B.taller C.thinner
3.A.invent B.find C.produce
4.A.careful B.serious C.clever
5.A.shine B.burn C.dry
6.A.time B.air C.sunlight
—Dad, can you tell me ____________? I miss her very much. —Next week, dear.
A.where my mum will go
B.when will my mum come back
C.when my mum will come back
