Think about some of the signs for the most popular fast food restaurants. What do the signs for McDonald's, Wendy's, Burger King, Dairy Queen and Pizza Hut have in common? They all make prominent (突出的) use of two colors: red and yellow.

Could it be that these colors — red and yellow — make you hungry and want to stop for fast food? Although it might sound crazy, that's exactly what some scientists believe. The idea even has a name: the ketchup (番茄酱) and mustard (芥末) theory.

Scientists also point out that studies show that color gets communicated to the brain faster than any other type of communication. For example, experts believe that the color red inspires feelings of warmth, comfort and love. Similarly, yellow draws feelings of happiness, excitement and cheer.

Researchers believe that these colors, especially when used on fast food restaurant signs, create the perfect feelings to make us feel hungry and want to stop to eat.

Other scientists,however,disagree with the ketchup and mustard theory and point out that there isn't enough scientific data (数据) to support the theory. They think that feelings of happiness and excitement connected with the colors red and yellow aren't necessarily equal to hunger.

While the science of colors and their exact influence on us may be uncertain, it’s clear that fast food restaurants believe that in some way, it is good for them to include red and yellow on their signs. Do these colors make us hungry? Maybe ... or perhaps it’s our own happy memories of delicious cheeseburgers, salty French fries and ice- cold sodas that keep us coming back for more!

【1】Why does the writer ask the question in Paragraph 1?

A.To know when people will feel hungry.

B.To ask people to take part in the research.

C.To get people into the topic of the passage.

D.To find what fast food restaurant sign is the most popular.

【2】What common point do most fast food restaurants share?

A.They provide similar foods.B.Their foods are in red and yellow.

C.Their signs include red and yellow.D.Their foods are the favorite of people.

【3】According to Paragraph 4, some scientists believe that ________.

A.people cannot refuse to enjoy fast foodB.colors can make communication easier

C.people use colors to express their feelingsD.colors have influences on our feelings

【4】What can we learn from the last paragraph?

A.Colors are important to fast food restaurants.B.It’s uncertain whether colors make us hungry.

C.We need to study the science of colors.D.Delicious food can leave us good memories.

That was a wonderful afternoon. The weather was pleasant and the wind was soft.

After having a big meal, my uncle and my two cousins decided to catch some fish for lunch the next day. They invited me to join them and see how they catch fish to earn money. They put on special coats and boots, and then headed to the pond. The bottom of the pond was filled with thick mud, so I thought it was difficult to catch fish there.

My uncle and my cousins jumped into the pond. The pond had a special drainage(排水) system so they could lead some water into another place, which made it easier to catch fish. After a while, the water level dropped and big fishes appeared. I was so amazed to see that the fishes here were two times bigger than regular ones. Out of breath, the fishes couldn't do anything but kept jumping. A great amount of mud splashed out(溅出) from the pond onto our clothes. My uncle and my cousins caught some fish skillfully. The basket was full of fishes two hours later, and they were then sent to the market.

I will never forget this interesting and pleasant afternoon.

【1】According to the writer, what was the most exciting thing during the Labor Day?

A.Catching fish.B.Visiting relatives.

C.Enjoying natural view.D.Tasting delicious food.

【2】When did the writer go catching fish with his/her uncle and cousin?

A.In the morningB.In the evening.C.In the afternoon.D.The next day.

【3】What does the underlined word "ones" in the third paragraph refer to?

A.pondsB.fishesC.mealsD.baskets

【4】What did the writer think of this experience?

A.BoringB.TiringC.UncomfortableD.Unforgettable

American teenagers used to look forward to growing up. Getting their first license or 【1】(work) at their first part-time jobs were exciting events in most teens' lives. 【2】 fewer American teens are doing "adult" activities like driving and working now.

Does too much homework made them 【3】(tire)? The answer is NO. Teens actually spend less time on homework now than they did in the 1990s. A child expert says that today's teens are different because they are the 【4】(one) generation to grow up with social media and smart phones.

What kind of effects does this have on how 【5】(quick) kids grow up? For one thing, kids spend more time playing with technology and less time on other things. This may explain【6】 fewer kids are interested in "adult" activities.

In high school, getting one's first driving license used to be regarded as something "cool" 【7】 could impress one's friends. But today, kids avoid 【8】(share) this with others. They would rather stay at home and play on their phones.

It is hard 【9】(say) growing up more slowly is good or bad. But kids can have more time for social and emotional 【10】(develop). It is necessary for success later in life.

— I think friends should always help each other. If my friends have difficulty, I’ll do my best to help them.

A.troubleB.suggestionC.difference

Lin Li, a teacher from Yantai, gives young students advice on how to deal with danger.

If you are in a traffic accident

If a car hits you, you should remember the car number. If it is a bicycle, try to call your parents before you let the rider go. This is because you don’t know how seriously you are hurt.

If it is raining hard and there is lightning

Don’t stay in high places and stay away from trees.

When there is a fire

Get away as fast as you can. Put wet things on your body and try to find an exit. Do not take the lift.

If someone is drowning

If you can’t swim, don’t get into the water. Cry out for help.

Remember that danger is never as far away as you think. Take care of yourself at all times!

If you are robbed（抢劫）

Keep calm. If you cannot cry for help or run away, give the robber your money. Try to remember what the robber looks like and tell the police later.

【1】Many schools have started a new lesson on self—protection because it is a big problem.

【2】If you are hit by a car, you are supposed to remember what the driver looks like.

【3】When you are in the rain, you must stay close to the trees and stay in low places.

【4】You should shout for help if your money and treasures are robbed by someone.

【5】We can learn how to protect ourselves if we are in danger from the passage.

Robots lend a hand

Robots are being used to fight the virus. For example, medical workers at the Third People’s Hospital of Shenzhen are using robots to do routine (常规的) medical tasks.

Developed by Chinese AI company UB Tech, these robots can offer medical advice, deliver (递送）medicines and disinfect (消毒) wards (病房) and other areas. They can also check temperatures, according to China Daily.

Liu Yue, head of the hospital’s fever outpatient services (发热门诊), said the robots have made work much easier. “It greatly reduces our burden (负担), and it can also prevent us from missing infected patients,” Liu said.

Remote (远程的) healthcare services

It can be dangerous for medical workers and patients to come into contact ( 接 触 ) with each other. But with remote medical services, doctors at different hospitals can share photos and videos to come up with the best treatment. China’s three biggest telecom companies are providing hospitals across the country with 5G support. This allows them to transfer(传送) large amounts of data (数据) quickly.

For example, on Feb 27, doctors in the cities of Beijing, Shanghai and Guangzhou used 5G technology to treat a severely (严重地) ill 67-year-old patient in Wuhan, according to China Daily. By diagnosing (诊断) patients remotely, doctors can protect both themselves and their patients.

AI makes work more efficient (高效的)

Ask Bob is an AI-powered consultation ( 咨 询 ) platform. Developed by Ping An Smart Healthcare, it can provide users with information about the virus, help people do medical self-checks, check their mental ( 心 理 的 ) health and choose the right face masks, according to China Daily.

Ping An Smart Healthcare has also developed AI software that can read CT images and provide accurate ( 准 确 的 ) analyses (分析) to doctors. This can speed up the diagnostic process and allow doctors to give faster treatment.

根据短文内容，选择最佳答案。

【1】What did robots do during the epidemic?

a.They delivered medicines.

b.They disinfected wards.

c.They transferred patients.

d.They checked temperatures.

A.abcB.abdC.acdD.bcd

【2】What happened to the severely ill 67—year—old patient in Wuhan?

A.He was treated remotely.B.He was treated by robots.

C.He was transferred to Beijing.D.He was not diagnosed with the virus.

【3】The AI software developed by Ping An Smart Healthcare can help________.

A.save treatment costsB.collect and transfer data

C.develop a vaccineD.reduce doctors’ burdens

【4】Which of the following statements is WRONG?

A.Ask Bob is an AI—powered consultation platform, which is developed by Ping An Smart Healthcare.

B.By diagnosing patients remotely, doctors can protect neither themselves nor their patients.

C.With remote medical services, doctors at different hospitals can share photos and videos to come up with the best treatment.

D.Medical workers at the Third People’s Hospital of Shenzhen are using robots to do routine medical tasks.

【5】The story is mainly about________.

A.how smart technology is developing in China

B.why China was slow to control the epidemic

C.how smart technology helps doctors during the outbreak

D.which smart technologies are being developed in China

The novel coronavirus made the spring of 2020 very different. As the virus can easily【1】from one to another, the students in primary and junior high schools didn’t have to go to school. At the same time, online education has become popular among them. Students could learn on the Internet【2】of sitting in the classroom.

At first, some parents were【3】online courses that would bring children myopia(近视)and some other influences, but after a few days of carefully watching, they believed online education would be 【4】for their children’s study.

But many schools only regard online education【5】a second choice. In fact, schools and teachers should keep a more open mind to accept online education.

A: Hi, everybody. I’m Becky. Welcome back to “The Problem Line”. Today, we’re going to talk about problems with parents. Okay, it’s time for another call.【1】

B: Hello. My name’s David.

A: Hi, David. Welcome to “The Problem Line”.【2】

B: Well, I’m having problems with my mom. Every time we talk about something, we argue.

A:【3】 It’s impolite.

B: I know. But she always arranges everything for me. I can’t even decide what to wear on weekends.

A: That’s too bad.【4】

B: I tried, but she never listened to me. She thinks I should listen to her because I’m her child.

A: Well, that’s a difficult problem.【5】

C: Hello, I’m Vera. I think David should ask his teacher for help. Perhaps his mother will listen to his teacher.

B: OK. I’ll have a try. Thank you.

A.What’s your problem?

B.Hello, who’s calling?

C.Why not have a good talk with her?

D.You shouldn’t argue with your mom.

E.Dear listeners, who can give him some advice?

F.You should learn from them.

【1】As we know, Changjiang is the ________ (three) longest river in the world.

【2】Uncle Sam is an old man with lots of________( hobby), like playing basketball and painting.

【3】To keep healthy, we should eat________ (little) meat and more fruit and vegetables.

【4】He needs money to buy a house so he wants to sell his car________ (cheap).

【5】I didn’t finish ________ (write)my test because I ran out of time.

【1】The alarm clock didn’t go________, so I was late for work this morning.

【2】I was so sleepy that I could hardly keep my eyes ________.

【3】She was so careless that she hurt________while going downstairs.

【4】It’s reported Flight 471 have to ________ at the nearest airport because of the bad weather.

【5】Those young clerks like playing jokes________each other in the office. They have good relationships.