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.

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.

The water on the Earth keeps moving around and around in a cycle     1     (call) the water cycle. However, the amount (数量) of freshwater in our world is not spread evenly (均匀地) across the planet. People living in cities use the most water,     2     some people have only a small amount for their     3     (day) needs.

The problem is that     4     freshwater in our world could be running out. The population in the world is growing,     5     means more and more water is being used. The climate is changing and becoming     6     (warm) than it was. This changes weather patterns, so in some places there is no longer enough rain to allow people     7     (live). Add in the problem of polluted water, and the situation becomes bad indeed.

Having water whenever we need or want is something we take for granted. Whenever we use it, we need to think about how we can save it. There are many small     8     (step) we can take that add up to big water savings! Taking shorter showers and turning off the water while brushing your teeth     9     (be) all the ways to help. As long as each of us has the sense of     10     (save) water, we can see huge changes.

Good morning, everyone. Today I’d like to give a lecture about cycling. For anyone     1    ( who/whose)is considering going on a tour, the first thing to consider is     2    (safe/safety). First, wear something that can be     3    (easy/easily) seen, red jackets, for example. Second,don’t try to ride too far, too quickly. Take     4    (you/your) time, and if you feel     5    (tiring/tired), stop and rest. Third, if you are planning your journey in the summer, take plenty     6     (of/off) water. You are advised     7    (to drink/drinking) at least one litre(升) of water every hour. If the weather is not very warm, make sure that you take some warm     8    (cloth/clothes). And put them on when you stop     9    (ride/riding). Even in cold weather you can become very warm when you are riding and then it is very easy to catch     10    (a/an) cold when you stop.

Every Saturday, 73-year-old Zhao Guihua takes a special course. In a classroom located in a residential community in the city of Hefei, Anhui, Zhao and her classmates, all seniors, most     1    (wear) reading glasses, learn how to shop on their smartphones.

“We offer a course     2     teaches seniors how to use their smartphones to scan(扫描)health-tracking QR codes(二维码), buy things online, register for hospital visits, and shoot short films,” said Liu Li, who is the     3    (found) of the e-course.

Liu has been providing services for the elderly for 10     4     (year). After learning that many old people don't know about the use of digital devices(设备) in their daily lives, she     5     (start) the smartphone course in August last year to help them cross the digital divide.

Official data show that by the end of 2019, some 150 million seniors at or above the age of 60 in China hadn't had the opportunity     6    (use) the Internet.

“During COVID-19, scanning a health-tracking QR code     7     (need) when we go to a supermarket or take a bus,” said 63-vear-old learner Liu Shaomin.

Instructor Huang Zhen said the course started with the basics of smartphones and that the learners were all crazy about it. Over several months. The number of learners grew rapidly, with ages ranging     8     60 to 90.

“Now I can read news, buy train tickets and book tickets for tourist attractions on my smartphone,” Zhao said     9     (proud). “Scanning health tracking QR codes is now     10     piece of cake for me.”

The Sanxingdui Ruins in Southwest China’s Sichuan province, together with the Jinsha Ruins in Chengdu, will apply for(申请) World Cultural Heritage status(世界文化遗产).

The Sanxingdui Ruins in the city of Guanghan, are thought to be one of the     1     (great) archeological(考古学的) finds of the 20th century. The ruins     2     (cover) an area of 12 square km are believed to be the remnants(遗迹) of the Shu Kingdom, dating back some 4,800 years.

The site was accidentally discovered by a farmer     3     he was digging a ditch in the 1920s. In 1986, a large number of unique relics were found in the No 1 and No 2 pits,     4     arouse global interest.

The discovery of Sanxingdui     5    (raise) an important question about the origin of Chinese civilization(文明). Before the 1980s, it is thought     6     the birthplace of Chinese civilization was in the Yellow River Basin in north China.

However, with the discovery of important     7    (relic) in the Yangtze River Basin, including Liangzhu, Shijiahe and Sanxingdui, a new understanding came     8     being. The ancient Shu civilization     9     (represent) by Sanxingdui has been regarded as     10     important part of the origin of Chinese civilization.