There comes a time when the old must give way to the new. Finding and     1    (keep) the balance between progress and the protection of cultural sites can be     2     big challenge.

In the 1950s, the Egyptian government wanted     3    (build) a new dam across the Nile to benefit more farmers,     4     lead to protests. The government turned     5     the United Nations for help. Then a committee     6    (establish) to limit damage to the Egyptian buildings.     7    (final), a document was signed, and the work began in 1960.

When the project ended in 1980, it was considered a great     8    (succeed). The spirit of the Aswan Dam project     9    (be) still alive today. If a problem seems too difficult for a single nation, the     10    (globe) community can sometimes provide a solution.

Tu Youyou is universally acknowledged as a scientist of great achievement. Born in Ningbo, China, on 30 December 1930, Tu Youyou graduated     1     Peking University Medical School in 1955. In 1967, she was chosen for a research team     2     was formed by the government with the aim of discovering a new     3     (treat) for malaria and two years later she became the head of the project in Beijing. She and her teammates examined over 2,000 old medical texts,     4     (evaluate) 280,000 plants for their medical properties, and tested 380 distinct ancient Chinese medical treatments that showed promise in the fight against malaria. As a     5     (commit) and patient scientist, she never acknowledged defeat whatever difficulty she met. After failing to draw out useful extract by     6     (boil) the west wormwood, she began even     7     (careful) thinking and research work. She drew     8     conclusion that boiling the sweet wormwood     9     (destroy) its medical properties. So she used lower temperature     10     (draw) on the extract and finally she succeeded.

China’s first panda-themed tourist train     1     (leave) Chengdu Railway Station for Zunyi in neighboring Guizhou Province last Sunday night.

The train is decorated     2     giant panda images. Attendants (乘务员) carry some panda     3     (toy) and passengers can even try panda-shaped food. The three-day trip costs 1,280 yuan. The train can accommodate 252 passengers. It     4     (have) a dining room, bar, karaoke room and dance hall.

The dining rooms might be the     5     (big) attraction for passengers from Sichuan, whose people     6     (know) for their fondness of spicy food.     7     (actual), Chengdu is better known for its love of hotpot     8     its other attractions, according to an online survey     9     (conduct) by sohu.com two decades ago.

Zhong Shu,     10     official from Chengdu Railway International Business Travel Group, said the train may travel to other parts of the country if it proves to be a success.

Before the Tokyo 2020 Paralympic Games, visually-impaired (视力受损的)Chinese runner Liu Cuiqing put a lot of stress on     1    (she) to do well. Finally, she made it. She won two gold medals with the help of her sighted guide Xu Donglin and brought honor and glory for China.

In 2010, she joined the national athletics team    2     was made up of disabled people. She has had to experience countless challenges. “As a blind person, I learn things     3    (slowly) than other people do,” she said. Sports competitions for disabled     4    (athlete) require blind runners to be assisted by a guide. Liu met Xu in 2013 and since then, the two     5    (train) hard together, linked by a thin rope. “To other people, this may just be     6    ordinary rope, but to us, it is the eye, the direction and trust. We depend     7     the rope to feel the turns and the distance between us. Only when she trusts me     8    (complete) is she able to run boldly(大胆地),” Xu told CCTV.

At the 2016 Rio de Janeiro Paralympic Games, after    9    (cross) the finish line, Xu fell heavily because of a pain in his right knee. “In fact, when I was running, my leg was already so    10    (pain) that I could not feel anything. I only had one thought, which was to accompany her (Liu) to the end,” he told CCTV after the race.

Lionel Messi,     1     athlete from the South American country, is one of the greatest soccer players alive today. At a young age, he moved to Spain and now plays     2     (professional) for the FC Barcelona. Messi started playing soccer at the age of 5 for a small soccer team which     3     (own) by his father. Even as a young boy, he did very well. But when he was 11 years old, he found out he had a     4     (sick) which would prevent him     5     (grow) much taller. There was a way to help him grow more, but his parents did not have enough money for his medical needs. So they looked around for a soccer club     6     would be able to do this for them. The clubs in Argentina couldn’t help him.

    7     the famous FC Barcelona in Spain offered     8     (accept) Messi on the junior team and pay     9     the bills. The Messi family happily took the offer and moved to Spain. With his incredible talent, Messi     10       (surprise) the world since then.

My aunt Betty is a typist     1    has always wanted to go on a time travel holiday. Last year she decided to design her own time tour. She    2     (want) to take a space capsule to AD 3050. The representative    3    the time travel company gave her the impression that the space capsule was easy     4     (handle). He told her about its efficiency and safety. This increased her motivation to take the DIY (Do It Yourself) time tour. However, her trip was not the instant    5     ( succeed) she had expected. When she pressed the switch to begin the journey, there was a flash and the capsule's engine died. No matter    6    hard she tried, Aunt Betty was unable to restart the engine. It seemed that the capsule was far from being efficient and    7     ( rely ). She wondered if some parts of the capsule had been     8     ( make ) from second-hand materials.    9     ( obvious) it was quite unsafe for her to travel in. So instead of visiting settlements far in the future, Aunt Betty had to be satisfied with going to Hainan for     10     ( she) holiday !

After taking the national college entrance exam, many will finally get to enjoy a relaxing summer vacation. But for some, the end of the exam is the    1    （begin）of shouldering more responsibilities. Zhou Liangyu, is one such student. He volunteered to fight on the frontlines of flood control. Without any experience, he met with many    2    （difficulty）. "There was a time    3    the rain wetted his clothes when he was on the first night shift from 11：00 pm to 7：00 am.” Yang Zhifa, the team leader of the flood-control group, told Changiang Daily. But “he never made any complaints, even though he was the    4    （young）member of our team." Unlike Zhou contributing to his city, Zhao Guining, 18, chose to devote his time    5    his family.    6    （reduce）his family's burden, he worked on a construction site with 150 yuan paid per day. Doing such physically demanding work    7    （be）exhausting, but it does provide real-world working experience.

Making money during this special summer may be one aim, but for Liu Yu, 17,     8    comes from Shandong province, it can also be a way to prepare for her future career. She spent three hours every day    9    （teach）a would-be senior 1 student. She realized how important it is to be responsible,     10    （patience）and compassionate to students. Students will now begin their life journey taking responsibility for society, family and themselves and create the future they wish to see.

The Chinese New Year red envelope (红包) is one of     1     most popular Chinese traditions for children on the Chinese New Year. They receive red envelopes with money inside! Little kids     2     (usual) learn the words “hong bao” in Mandarin (普通话) very quickly.

The red color     3     (stand) for good luck for the Chinese. Traditionally the envelopes are decorated with gold letters and messages of     4     (happy) or Chinese lucky symbols like the Chinese dragon, the phoenix, etc. Nowadays, in     5     (keep) up with the times, you can find anything from Mickey Mouse to Hello Kitty on the red envelopes.

Generally, kids     6       are unmarried all get red envelopes during the Chinese New Year from their grandparents, uncles, aunts and parents of course. Close     7     (friend ) also give red envelopes to children during the festival. Who gives money and how much money     8     (give) mainly depend on the personal relationship and the age of the kids. And     9       is quite common for an adult     10       (receive) a kid’s greeting for a red envelope during the Chinese New Year.