A memorial service     1     (bid) farewell to “father of hybrid rice” Yuan Longping     2     (hold) in Changsha, Central China’s Hunan province on Monday.

Despite it     3    (be) a busy work day, thousands of people wearing black came to the Mingyangshan Mortuary House in the city,     4    the memorial service was held at 10 am, to present bouquets (花束) and bunches of rice and pay tribute (颂词) to Yuan.

The top rice scientist, who developed the first high-yield hybrid rice strain in 1973, died of organ     5     (fail) at age 91 on Saturday.

The agronomist (农学家) spent over five decades     6    (research) and improving hybrid rice, which has reached its third generation, helping China work     7    great wonder— feeding nearly one-fifth of the world’s population with less than 9 percent of the world’s total arable (适合耕种的) land.

People from all walks of life in China and abroad expressed their condolences after Yuan’s death, which indicated that his contribution to the hybrid rice industry has been     8    (wide) recognized and highly praised, Zhao Lijian, spokesman of the Ministry of Foreign Affairs, said at a news conference in Beijing on Monday.

“His death is a great loss to China and the world, and he     9    (remember) by people” , Zhao said.

He added that academician Yuan not only belongs to China, but also to the world. His lifelong dream was to see hybrid rice to be planted around the world,     10    no one will be left hungry.

Chinese scientists have created starch(淀粉) using carbon dioxide, hydrogen and electricity, according to a study     1     was published in the journal Science on Sept 24.

It's the first time in the world that synthesis(合成) of starch from CO₂     2     (achieve). Scientists believe it will have a     3     (revolution) impact on future agricultural production and bio-manufacturing.

According to Ma Yanhe,     4     author of the study, the process of plants     5     (create) carbohydrates like starch through photosynthesis(光合作用)is complex and     6     (efficient). It takes a plant about 60 steps of metabolic(新陈代谢的) reactions to turn CO₂, water and sunlight into starch. But now Chinese scientists have simplified the process from 60 steps into 11.

Creating carbohydrates more efficiently is so important for     7     (sustainable) on Earth, noted ChinaDaily. If such an approach can be scaled up(扩展) to the level of industrialization, it     8     (save) more than 90 percent of the farm land and freshwater resources, and avoid negative effects on the environment     9     pesticides and chemical fertilizers(肥料), and it will improve food     10     (secure) and promote sustainable societies, according to Cai Tao, another author of the study.

For more than a thousand years, Cairo has been the capital city of Egypt. But that will be changed in the near future.

In December, the Egyptian     1    (administrate) in Cairo began to move its offices to the new capital as part of a six-month trial. Not     2    (official) named yet, the city     3    (know) as the New Administrative Capital.

Generally     4    (speak), the capital of a country serves as its political,     5    (economy) and cultural center. However, in Egypt’s case, overcrowding     6    (lead) its capital to become congested (拥堵的) and has worsened other problems such as air pollution.

Cairo,     7    (locate) at the top of the heavily populated Nile Delta, attracts people across the country. At present, the city has more than 20 million people. But its population will double     8     40 million by 2050.

The Egyptian government has great desires for the new capital,     9     size is much bigger. Beginning its construction in 2015, the new capital covers 714 square kilometers, nearly twice     10     size of Cairo.

The old man pulled on him all that he could to bring him closer     1    the fish was coming in on his circle. He straightened himself and began another circle. The old man moved him. He felt faint again now but he held     2     the great fish all the strain that he could. He held up.

Though he put all of his effort on,     3    (pull) with all his strength, the fish swam away. That way nothing     4    ( accomplish ), he thought. This time he must get him alongside. He is not good for many more turns. But he is good for ever. He nearly had him and again the fish righted himself and swam slowly away. Never has he seen a    5    (great), or more beautiful, or a calmer or more noble thing than him. Now he was getting     6    (confuse) in the head. He must keep his head clear and know how to suffer like a man. He said to himself “Clear     7    , head”. Twice more it was the same on the turns. He had been     8     the point of feeling himself go each time. Trying it once more, he felt himself going. But the fish righted himself and swam off again slowly     9     the great tail weaving in the air. At that time, his hands were mushy now and he could only see well in flashes. He tried it again and it was the same. He felt himself     10    (go) before starting again, but he will try it once again.

Eighty-year-old Li Xinsheng clearly remembered the day her husband was diagnosed (诊断) with Alzheimer’s (阿尔茨海默病). Since then, she     1     (do) everything she can     2     (slow) the illness’s progression (进展). The couple recently attended a dance-therapy program, Time to Dance, which was initiated (发起) by the Scottish Ballet from the UK in 2017 to offer dance classes for people living     3     Alzheimer’s and their caregivers. Due to COVID, sessions     4     (hold) both online and in person last year. Both participants and instructors were referred to     5     (simple) as “dancers”. The dancers interacted with one another in a relaxing atmosphere and some started singing along with the songs     6     they danced.

The dance-therapy project proved helpful for the patients. Apart from     7     (help) the participants exercise and express     8     (they), it enabled the dancers to learn to communicate with others and be more open to everyday interpersonal interactions. “I feel moved. They’ve brought     9     (warm) to people with Alzheimer’s, who are often left unnoticed and forgotten in     10     corner,” Li Xinsheng said.

Pandas are not only a national treasure, but are loved around the world. The furry black-and-white animals have played     1     important role in the country's diplomacy (外交).

According to the Japanese Royal Annual, the practice dates back to the Tang Dynasty, when Empress Wu Zetian sent a pair of pandas     2     the Japanese emperor. China renewed panda diplomacy in the 1950s when China sent two pandas to the Moscow Zoo. By 1982, China     3     (give) 23 pandas to nine different countries. However, most of them have died. China stopped     4     (give) away pandas in the early 1980s. Instead, the animals are loaned to other countries. In general, they are to be returned to China after 10     5     (year).

But these cute Pandas are much     6    （difficult）to survive in other countries than in China. Why? According to Xinhua, their eating habit is one main reason. Their nutrition     7    (most) comes from bamboo shoots. Adult giant pandas consume about 40 kilograms of bamboo daily . However,     8     takes 10 years for a new crop of bamboo to mature（成熟）, and many countries do not have an environment     9     is suitable for bamboo to grow.

Based on the idea of a community with a shared future for mankind （人类命运共同体）, countries are trying their best to protect them. "We don't own the pandas,     10     the whole world wants to help save the panda, and we do that through our knowledge exchange, " Steven Mon fort, director of the Smithsonian's National Zoo said.

3D printing has several advantages     1     traditional manufacturing techniques. Building a model would be very expensive     2    (use) traditional manufacturing methods. You have to spend thousands or more to set up machine tools and then thousands more when you want to change that model. 3D printing makes it financially    3    (afford) to build one-off models. Making simple     4     (repair) to old household appliances, rather than replacing them, also becomes possible when spare parts can be printed off in your living room, rather than having to be tracked down and     5     (order) online. Using a 3D printer also cuts down the supply chain: the network of factories, warehouses and shipping companies normally needed to get a product to    6     end user.

But 3D printing also has its disadvantage. In general, 3D printers are slow. A two-inch-high figurine can take about one hour to print.     7     , consumer-grade 3D printers are only able to produce relatively simple plastic models.

Last but not least, 3D printing is facing legal challenges. Established players in manufacturing argue that their intellectual property is ripped off by home printers. Currently, the copyright laws are     8     (clear) about the degree to     9    3D designs and software are protectable, and what     10     (consider) violation.