【推荐1】At first glance, SoFi looks exactly like a real fish. But if you look     1    (close), it’s not hard to spot the truth: SoFi is a robot, or as     2     (it)MIT developers call it, “ a soft robotic fish”, according to BBC news.

SoFi     3     swim, turn and change speeds just like a real fish, and more     4     (importance), it can take high-resolution photos and videos with a camera     5    (build) into its nose. The robot’s “ soft artificial muscle” is made of a type of rubber, it has two side fins(鳍)for waving,     6     its nose also hides important electrical components(组成部分).

The team at MIT developed SoFi to swim among real fish to explore where few other robots or humans can, reported the Los Angeles Times. It     7    (operate) with a waterproof video game controller by someone     8     can be up to 21 meters away.

According to its leading     9    (create) Robert Katzschmann, SoFi, pronounced like the girl’s name “Sophie”, is an abbreviation(缩写)of soft fish--- and was named     10       a girl he had a crush(暗恋)on in high school.

When he was a little boy, Christopher Cockerell once noticed his mother turning the wheel of her sewing machine with her hand. “Won’t it work quickly if a machine    1    (turn) the wheel for you?” he asked. “I suppose it will.” said his mother, without paying any attention to him. Christopher knew she always had a lot of work and that she was    2     stubborn that he could hardly do anything to change    3    mind. But he wanted to help. In his bedroom there was a toy steam engine    4    (buy) by his father as a gift to him. “I will make better use of it,” little Christopher said to himself. So, when his mother was not using her sewing machine, he decided to fix the toy steam engine onto it. When he finished    5    (do) it, he was quite pleased, thinking his mother would like it. “Very clever,” his mother said when she saw it. But then she sat down and went on turning the wheel    6    hand. “I    7    (work) like this for too many years,” she explained. Christopher felt very    8    (disappoint). He couldn’t understand his mother’s    9    (behave).

This teaches Christopher a lesson,     10    made him depressed for several days. It is that anyone who tries to improve anything has to learn: many people don’t like new ideas.

At present, working staff in many cities of China have resumed work in     1     orderly manner. Employees need to wear masks when they go to work.     2     (natural), there are concerns that masks might be insufficient（不足）.

Good news is that since last month, companies in Guangdong province, Beijing and Shanghai     3     (begin) to produce a new type of face mask,     4     uses a nanomaterial (纳米材料）membrane (薄膜) to filter bacteria, viruses     5     other pathogens, according to local health and medical products authorities.

The new masks are designed to meet the same     6     (standard) of N95, meaning they filter particles of all sizes with at least 95 percent     7     (efficient).

The masks are also easy     8     (breathe) through and are pretty comfortable. Besides, this new type of masks can     9     (reuse) up to 20 times depending on the user’s setting and wear time, the authorities said.

The retail price（零售价）for the masks     10     (create) by companies from Shanghai will be around 15 to 20 yuan each.

Kungfu, also    1    （name）as wushu or Chinese martial arts, is    2    important part of traditional Chinese culture. It is    3    （probable）one of the earliest and longest lasting sports. The theory（原理）of kungfu is based    4    classical Chinese philosophy. Over its long history it has developed as a unique combination of exercise, practical self-defense, and art. There are many    5    （form）of Kungfu, namely Shaolin Kung Fu, Wing Chun, t’ai chi, etc. Each form of kungfu    6    （have）its own principles（原则）and techniques. It is in the late twentieth century    7    this term was used in relation to Chinese martial arts by the Chinese community.

Historically, the influence of Chinese kungfu can    8    （find）in books and in the performance art. Recently, those influences have appeared in the movies and television that have a much    9    （wide）audience. As a result, Chinese kungfu has spread rapidly and has a global influence. Nowadays, it is regarded as a traditional sport and opens a window for the world    10    （understand）Chinese culture.

May 4-Chinese Youth Day

Youth Day in China falls on May 4. It originates from the May 4th Movement,     1    happened during World War One. China attended the so called "Peace Conference" in Paris as one of the victorious nations.     2    , the Chinese delegates' demand to abrogate (废除)unfair treaties and     3     (stop) the aggression into and from China was rejected.

The news incensed (激怒)students in Beijing. Along with those from the business and educational circles, they sent a number of telegrams     4     (ask) the Chinese government to rethink to national sovereignty (国家主权).Succumbed to the pressures of imperialism, the Beiyang government was prepared to sign the treaty regardless of the anger of the people.

On May 4, 1919. many students gathered around Tiananmen Square and staged demonstrations. They boycotted classes in order to make     5       (speech) and ask to meet representatives of other countries. Many students joined in the strike and student groups from other cities answered the appeal. Some students were initially arrested,     6     eventually released due to a significant strike that threatened to crash the economy.

The effect of the movement worked as the government refused to sign the treaty. However, on September 30, 1919, the Paris Peace Treaty     7    (sign) by the USA. England, France, Japan and other countries except China and the Chinese delegates didn't attend the signing ceremony of the Paris Peace Conference.

The May Fourth Movement was an anti-imperialist as well as     8     anti-feudal movement. The core of the May Fourth Movement spirit is: patriotism, progress, democracy and science and marked the beginning of China's new democratic revolution.     9     a broader sense, it occurred in the time when the country was going through the New Culture Movement. In memory of the May 4th Movement, in December 1949, the Chinese government     10     (office) announced May 4 to be Youth Day of the People's Republic of China to inherit and carry forward the spirit of rebellion and revolution. It encouraged the youth to make bold changes and to be innovative.