When you use a computer, do you think about the mouse? This little plastic tool makes using computers so much   _________. It has a history that goes back nearly 50 years.

In 1963, American computer pioneer Douglas Engelbart   __________a prototype (原型) mouse. On April 27,1981, the first computer system with a mouse and user interface (界面)   ___________. This design plays an important part in the personal computing world   _________today.

The invention of the mouse was the beginning of a new age. __________the mouse, computer users had to use complex (复杂的) tools and difficult code (编码) to connect with their computers .

Some say _____________like the touchscreen (触摸屏) iPad will mean the end of the mouse, but others believe the mouse will be around for a while longer.

“It’s easy to ___________, and you don’t need to take your eyes off the screen to use it. These are the ___________for its long life,” says Ken Perlin, a professor at New York University.

Scientists are now working on adding ___________things to the mouse. Recently, they made a “soft mouse”, which is made from a soft plastic material. Using ____________is like touching a cat, so some computer users have started calling it a “cat”.

There is an internet saying: One day the “cat” may eat the “mouse”.

Tony became ill and had to spend all day in bed. Because other children could not come near him, he felt sad and lonely.

There wasn’t much to do, so he just looked out of the window. One day, he saw something strange outside the window. It was a penguin (企鹅) eating a sandwich. The penguin said “good afternoon” to Tony and then left.

Tony was very surprised. He tried to find out what was going on. Suddenly, he saw a monkey playing with a balloon outside his window. As he saw more and more strange animals, Tony couldn’t help laughing and found it hard to stop. In the following days, Tony could see many different animals every day.

A week later, his health improved and he went back to school. He told his classmates about all the strange things outside his window. While he was talking, he saw something in his friend, Henry’s schoolbag. Tony asked what it was and Henry showed him.

Inside the bag were many clothes that looked like animals. Henry and the other friends wore them to cheer Tony up while he was ill!

From that day on, Tony always tried his best to make sure his friends never felt sad or lonely.

In many countries, the novel coronavirus (新冠病毒) has changed the way people saying hello to each other. To help stop the spread of coronavirus, People give up their usual ways of greeting and invent safe ways. Let’s take a look!

No kissing, even if you are French

French people’s favorite way of saying hello is to touch cheeks (脸颊) and make a kissing sound. But when facing the virus, too many kisses are not good.

Now Frenchmen has got a suggestion: simply looking into a person’s eyes can be a greeting. It’s not so romantic. But it’s safe.

Grandma knows best

Italians are also romantic people. When they meet, they always hug or kiss each other. Recently, an Italian grandma made a video to help everyone fight the disease. According to her, if you want to say hello to others, do not hug or kiss. Instead, you can close one of your eyes and give them a wink (眨眼). Isn’t it cute?

Pat (拍打) on the back

It’s a very Australian thing to put your hand out to shake hands. But if you do this, the virus can jump from one person to another. Now Australians are told that a pat on the back would be better. But it also has some problems. For example, it’s a bit impolite if you do this to your teacher. What do you think?

Is the footshake the new handshake?

A video shows that an interesting way to say hello is now popular in Iran, an Asian country. In the video, three Iran men meet and tap (敲) their feet against each other. It looks like they are playing a fun game. If we cannot shake hands, why not try to “shake” feet?

At the age of 16, Einstein was always busy playing with a group of mischievous (顽皮捣蛋的) kids. He failed his final exam.

One morning, when Einstein was about to go fishing with his friends, his father stopped him and said, “Einstein, you like playing all day so much that you failed your exam. I’m worried about your future.”

“What are you worrying about? Jack and Robert also failed, but don’t they still get to go fishing? ”

“My boy, you can’t think like that,” his dad said. “There is a story that people tell in our hometown. Listen to it now.”

“There were two cats playing on the top of a house. One cat fell down the chimney (烟囱) while holding the other cat. When the two cats climbed out of the chimney, one of the cats had soot (烟灰) on his face, but the other cat’s face was clean. Seeing the soot-faced cat, the clean cat thought its own face must be dirty, so it quickly ran to the riverside and washed its face. The soot-faced cat saw the clean-faced cat and thought its own face was also clean, so it just went down the street happily.”

“Einstein, no one can be your ‘mirror (镜子)’. You have to think for yourself. If you just follow others, you will never learn.”

Hearing this, Einstein walked back to his room. He decided to study instead of caring about what his friends were doing. This allowed him to be successful.

People in Western countries are eating less meat these days. It is not only for their health but also for protecting animals. But now they have another reason.

Eating less meat can help to prevent the change of the weather condition, according to a study published in Nature.

Raising livestock like sheep and cows is harmful to the environment. Take cows for example, when they digest (消化) food, their stomachs make greenhouse (温室) gases, which are a major cause of global warming. 17% of greenhouse gas emissions (排放) come from livestock farming, The New York Times reported.

In addition, to raise these livestock, people have to cut down forests and turn them into farms. Forests play a key role in fighting global warming because they absorb greenhouse gases.

Eating less meat according to some advice could cut global food-related emissions by nearly a third by 2050, the study found. Keeping a vegetarian diet (素食) in the long term could bring down emissions by 63%.

But eating less meat won’t be easy. According to the study, people in Western countries will need to eat 90% less meat than they do now in order to have an influence on the weather condition. Scientists are now trying to find new foods to take the place of meat.

Some say that insects (昆虫) could help. A 2013 UN report said that eating insects is healthier and better for the environment. They produce 75% less greenhouse gases than livestock.

Some scientists are creating lab-grown meat. They make meat in a lab, using livestock cells (细胞). In the future, people might be able to buy this lab-grown meat.

The way you look is special. Do you know       86    I mean by that? We all look a little different. Some of us are tall. Some of us are fat. The       87    is, all of us have our own look – our own face.

Sometimes, we might feel bad about looking different. We might feel like we look ugly     88    weird (怪异的). But our differences are what make us       89    .

I       90    watched a speech by a man named Robert Hoge. Hoge was born with a strange-looking face. His mother       91    about the difficulties he would face in life.

But Hoge didn’t give up. Strangers would stare at (盯着看) him or     92    make fun of him. But he didn’t care. He decided to accept own his face and feel confident in       93    . He has gone on to live an amazing life.

It’s hard when you feel like you don’t look “normal (正常的)” or “perfect”. But the       94    is, no one is perfect. The important thing to       95    is that you are special, no matter what you look like.

96. 校园是我们学习与成长的地方。这里有亲爱的老师，可爱的同学，以及丰富多彩的活动。我们在这里度过了三年的时光，一定对它有着深深的感情。在毕业之际，请你以 “I Love Our School”为题，用英文写一篇短文，表达对学校的热爱。

I Love Our School

I love our school._______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________