Leather is a hugely popular material for a range of products, but this     1     (popular) comes at a price. The global leather industry kills over a billion animals every year. This     2     (cause) many to ask the question: is it possible to meet the global demand of leather without     3     (do) any harm to animals? A process called biofabrication(生物制作) may be the answer.

Biofabrication is not new; it is already commonly used in medicine. Scientists have applied the technique to grow body parts like ear, skin, and bones for transplants(移植). But it can also     4     (use) to make other products, such as leather. Scientists will be able to make biofabricated leather with whatever qualities they want, such as extra softness, greater strength, or even different colors and patterns.

But how     5     (exact) does biofabrication work?     6     (grow) leather, scientists begin by taking some cells from an animal, not hurting     7     animal in any way. They then set the cells apart and grow them in a lab. This process takes millions of cells and expands them into billions. Next, the scientists take the cells and spread them out to form thin sheets,     8     are then put together to combine into a little     9     (thick) sheets. Anyone can then dye and finish the leather and design it in any way they like.

Andras Forgacs supports biofabrication. He says it may even be a “natural evolution of manufacturing for mankind.” We will be able to make the products we need in an efficient,   responsible,     10     creative way.

As a young child. Ann Makosinski would spend hours experimenting with her toys and other everyday objects around her to create her own inventions.

Now a iirst-year Arts student. Makosinski is a well-known inventor and entrepreneur. She won the 2015 Sustainable Entrepreneurship Award of Excellence,     1     recognizes innovative business solutions to social problems 一 the same recognition given to Barack Obama in 2014. Her own inventions, the Hol lew Flashlight and the c-Drink. have been causing excitement internationally     2     their creation.

At the age of 15. Makosinski created a prototype (I京型)ibr a ilashlight     3     (power) by the heat of one's hand. This invention was the result of a ninth grade science project, but Makosinski's goal was     4     (offer) a practical solution to people with unlimited access to power and electricity.

"I'm hali-Filipino and hali-Polish. and one of my iriends irom the Philippines told me that she tailed school     5     she couldn't aitbrd electricity. She had no light to study with at night, so that was kind of the inspiration." Makosinski explained. "I've always been interested in doing science projects, so I thought, why don't I find a way to provide her and a lot of other people with light?"

The Hollow Flashlight is made from Peltier tiles (珀耳贴贴片)that produce energy when one side    6     (heat) and the other side remains cool. The ilashlight can produce a steady beam of LED light ibr 20 minutes.     7     (use) only the warmth of the human hand.

Her advice to other student innovators? "Start now. There     8     be nothing holding you back. Some students at colleges or even in high school think 'Oh. I'm a student. I just need to study?     9     may think it important to make iriends and be social. The truth is, you can do a lot of other things. You can do     10     you want. Just go ahead."

In the Ming dynasty, a Chinese man     1     (name) Wan Hu made the world’s first rocket,     2     unluckily he lost his life with it. It was not     3     April 24, 1970 that China sent the first satellite Donfanghong I to space     4     (successful). To celebrate the first big success in the country’s space     5     (develop), we now make April 24 China’s Space Day.

China also announces new plans     6     (make) a space station and go to Mars and further space. It plans to finish building     7     (it) space station around 2022. According to China’s top space scientist Zhou Jianping, at that time, becoming an astronaut will be a normal job.     8     (many) astronauts are needed than ever before. They need to be able to finish difficult tasks.

By now, China     9     (choose) astronauts mainly from pilots like Yang Liwei. In the future, astronauts will also be picked from engineers, doctors and space technology experts. Another plan is about Mars. In order to explore Mars, China sent a spacecraft,     10     name is Tianwen-1, first to Mars on July 23, 2020. It will land the and even bring back things from Mars.

Many people have the hobby of collecting things, e.g. stamps, postcards. In the 18th and 19th centuries,    1     (wealth) people travelled and collected plants, historical objects and works of art. They kept their collection at home until it got too big     2    until they died, and then it was given to a museum. The 80, 000 objects collected by Sir Hans Sloane, for example,    3     (become) the core collection of the British Museum    4     opened in 1759.

The parts of a museum that are open to the public    5     (call) galleries or rooms. Often, only a small part of a museum’s collection    6     (be) on display. Most of it is stored away or used for research.

Many museums are lively places. As well as looking at exhibits, visitors can play with computer simulations（模拟）and imagine    7     (they) living at a different time in history or     8    (walk)through a rainforest. At the Jorvik Centre in York, the city's Viking settlement is recreated, and people experience the sights, sounds and     9    (smell) of the old town. Museums must compete     10    people’s spare time and money with other amusements. Most museums also welcome school groups and arrange special activities for children.