At 2.54 meters, Leonid is probably the tallest man in    1    world.33-year-old Leonid suffers from a rare illness. So    2    (he)body can produce too much growth hormone(荷尔蒙).

Leonid lives with his    3    (mother) in a small house with four rooms, sleeping on two double beds pushed together. He has to    4    (walk) with his head bowed because he is so tall. Several years ago, he    5    (graduate) from university, and used to work as a doctor on a local farm, but he lost his job as he could no longer ride his bicycle.

“I don’t    6    (real) have any friends. I rely on my mother,”he says. “I don’t    7    (know) what I’ll do. I don’ t even know how    8    (buy) food. I haven’t been to the market for five years.”It’s a lonely life, but he is happy working in his garden. Luckily, nobody laughs at Leonid in the village. His neighbors are all very fond of him. “We’ re going to take him on a     9     (trip) to the mountains,”says one of them, “to show him there’s something in the world    10    (tall) than he is.”

During the winter holiday, I volunteered at a nursing home to help look after the old people there. This experience allowed me    1     (have) a better understanding of the need to care for the elderly.

In the morning, I walked into the nursing home with a smile as bright    2     sunshine. I said hello to everyone. Then I    3     (join) the rest of the volunteers as they did their work.We cleaned tables    4    mopped the floor. We wanted to make the nursing home neat and     5     (comfort) to live in.

After     6     (clean), some of us gave the elderly haircuts, chatted with them, or cooked food for     7     (they) in the kitchen. I was busy putting up Spring Festival couplets (对联) .Seeing the elderly smiling, I felt a sense of joy deep in my heart. At the end of the day, everyone got together and sang the beautiful song Grateful Heart.

Respecting and loving the elderly is    8     traditional virtue (美德) . I think the only things the elderly    9     (real) need are company (陪伴) and love. By giving them love, we can also feel the kind of joy    10    can only be gained by giving.

The total number of tigers in many countries has greatly decreased these years.     1    the development of Asia, many lands have been divided up for roads, farms, factories, and so on.     2    , tigers are losing their natural habitats.     3    (hunt) who kill wildlife     4    for human consumption or for illegal trade have reduced numbers of deer and other animals,     5     (make) tigers’ food insufficient. Some roads allow people to     6     (easy) get close to places where wild tigers live. Tigers     7     (kill) for their fur, bones and other body parts, many of     8    are used as ingredients in medicines. Even though the sale of tiger parts is illegal, some people still take     9    (risk). In 1920, scientists     10     (figure) out that there were 100,000 tigers in the wild. But today the number is in the low thousands.

Today we     1     （visit）Qinghua University in Beijing and we couldn’t wait to go to the famous     2    (sight) there .

Early in the morning we arrived     3     the gate of Tsinghua University, where we were     4     (warm) welcomed by an old professor, who then showed us around the     5     (attract) campus.

In the library, we saw some university students     6    (read) attentively in the reading rooms. After that, we came to the lab building. At the end of the visit, the old professor gave us     7    lecture on science in the afternoon,       8     interested us very much. Time passed so quickly that before we knew it, it was time   to say goodbye to the professor.

Since then, I have worked harder at my lessons than usual and made up     9    (I) mind to be a student of Qinghua University. I am looking forward to     10    (go) to it.

A promising subject will provide you with knowledge and also better career     1     (opportunity).

So what subject should you choose in college? In October, Shanghai Ranking Consultancy     2     (announce) the 2020 edition of the Best Chinese Subjects ranking.

The ranking selected the universities on the Chinese mainland,     3     offer master’s degrees in 96 national first-level subjects.     4     (base) on factors such as research projects, awards and achievements etc, the consultancy evaluated the universities’ performances in each subject.

    5     (Fortunate), in terms of quantity, Zhejiang University ranked first with 59 subjects on the list, followed by Tsinghua and Wuhan University with 58 entries each.

There are 236 subjects from 90 universities that     6     (regard) as "top Chinese subjects". Peking University and Tsinghua University tied for first place with 24 top subjects. Eight subjects of Zhejiang University ranked among the top three,     7     (include) optical engineering and civil engineering. Subjects were classified into 13 fields. For computer science and software engineering, Tsinghua University had the     8     (high) score.

Experts point out that     9     number of subjects provided by Chinese universities is growing. Meanwhile, thanks     10     consistent investment (投资) into China' s higher education departments and programs like the Double First-Class Initiative (双一流), the academic programs are improving.

With hospitals filled up with COVID-19 patients, NASA has announced it will be delaying an upcoming satellite launch. The liquid oxygen     1     (need) to fuel the flight is also needed in hospitals,     2     doctors use the important resource to keep     3     (dangerous) sick COVID-19 patients alive.

“Medical oxygen is     4     priority (优先) of our members,” says Richard Craig, vice president of technical and regulatory affairs for the Compressed Gas Association.

A shortage of truck drivers     5     the certifications needed to transport the oxygen is only adding to the problem, and there are     6     (concern) about other rocket launches being pushed back as well.

At the recently held Space Symposium in Colorado, SpaceX president Gwynne Shotwell     7     (invite) anyone with access to liquid oxygen to reach out. “We certainly are going to make sure the hospitals are going to have the oxygen that they need but for anybody who has liquid oxygen     8     (spare), send me an email,” she said.

SpaceX founder Elon Musk tweeted that the shortage was “a risk,     9     not yet a limiting factor”. So far, 26 rocket launches     10     (plan) by the company.

Due to a medical error, 44-year-old Safiya became blind. She felt    1    （help）. And all she had to depend    2     was her husband Meraj. Meraj wanted to help Safiya gain her confidence again.

Finally, Safiya felt ready to return to her job,    3    now would she get there? She used to take the bus, but now too frightened to get around the city by herself. Meraj promised    4    （ride）the bus with her.

For two weeks, they made the journey together each morning and Meraj    5    （take）a taxi back to his office. Finally, Safiya decided to try the trip    6    . Monday, Tuesday, Wednesday, Thursday…Each day she went on her own. It went perfectly.

On Friday morning, Safiya took the bus to work as usual. When she got off the bus, the driver said; "Lady, I sure envy you. You know, every morning for the past week, a gentleman stood across the corner    7    （watch）you. He makes sure you cross the street    8    （safe）, and he won't leave until you enter your office building."

Tears of    9    （happy）poured down Safiya's cheeks. Her husband had given her a gift    10    （powerful）than sight—the gift of love that can bring light.

Have you ever wondered     1    the world looked like millions of the years ago? Although it is impossible to travel back in time, we can still get some     2    (clue), from fossils(化石).

An international research team     3    (lead) by Chinese scientists recently published their discovery of a large group     4    fossils. They found them in Zhang pu county in Fujian Province. They call the group the Zhang pu biota(生物群). The biota includes around 25,000 amber(琥珀) fossils and 5,000 plants fossils. They are nearly 15 million years old.

Scientists first found     5     Zhang pu biota in 2010. They kept     6    (do) research there for ten years and made several big discoveries. Today’s Fujian Privnce was once a tropical rainforest 15 million years ago. There     7    (be) all kinds of animals and plants in the forests. Many of them can     8    (find) today. It is the     9    (rich) tropical rainforest biota discovered so far.

The best finding of all is the rich samples(样本) of insects in amber. The amber fossils have kept the ancient insects quite well,     10    (make) them the natural ‘museum’of prehistoric(史前的) life.

As we all know, bikes are    1     (main) made of steel. But can you imagine that they can be made     2     bamboo? Do you want to know how a bamboo bike is produced? Do you want to make     3     (you) own bike with bamboo? You can do it at the Bamboo Bike Studio in New York. People there can teach you how to make your won bamboo bike.

The studio is also helping build factories in Ghana,     4     is a country in Western Africa. The factories will make cheap bamboo bikes.

Bamboo is as good as steel for     5     (build) a good bike. Marty Odlin works at the studio. He says     6     bamboo bike is the wonderful everyday bike.

In Ghana, bikes are very popular. Few people have money to buy a car. And people like to use bikes     7     (carry) most of their food and other goods.

In addition, people of Ghana are very poor and they can’t build factories to make     8     (tradition) steel bikes. But making bamboo bikes     9     (be) cheap. Odlin is planning to show the Ghanaian     10     (work) how to quickly make bamboo bikes now. He hopes that more and more Ghanaian people can have bamboo bikes.

One day , an artist was coming home by     1    (train), and he gave his last few     2    (coin) to a beggar . But then he saw another one and forgot that he didn’t have any money left.

He     3    (ask) the man if he would like to have supper with     4    (he), and the beggar accepted , so they went into     5    small restaurant and had a good     6    (meal).

At the end , the artist didn’t     7    (have) money to pay the bill , so the beggar had to do it . The artist was very     8    (happy) about this, so he said to the beggar, “Come home with me by taxi and I’ll pay you back .” “Oh , no!” the beggar answered     9    (quick), “I had to pay for your lunch , but I don’t want     10    (pay) for your taxi home.”