In the future, everybody will have a Harry Potter invisibility cloak in the closet, said Chu Junhao,     1     academician of the Chinese Academy of Sciences in Shanghai on Saturday.

At the Super Science Night     2     (hold) by Bilibili, China’s major video-sharing platform, Chu showed     3     invisibility can be achieved with special technologies and materials. He asked two staff members to hold a panel in front of him.     4    (initial) , the lower part of his body was visible through the panel. After rotating the panel 90 degrees, his lower half disappeared,     5     the stage behind him could still be clearly seen.

The magic was realized by a lenticular (透镜的) grating composed     6     rows of tiny cylindrical (圆柱形的) convex (凸面的) lenses, and each vertical cylindrical convex lens can shrink and thin objects parallel to it, so that light can be refracted (折射的) , according to Chu. When a row of cylindrical convex lenses forms a grating, several images     7    are too small to be noticed by the eye     8    (produce) achieving an invisibility effect. Chu also showed several other ways     9    (invisible) , such as using two substances with similar refractive indices and a plane mirror to create reflection imaging.

“Invisibility in science fiction will become    10    (real) as invisibility technology and material develop,” he said. “More invisibility equipment will change our life, such as invisible rooms that can provide better privacy and invisible hearing-aids.”

Are you familiar with pop star Jay Chou’s Blue &White Porcelain? Its original lines, just     1     the composer Fang Wenshan described, were inspired by Ru porcelain (汝瓷).

Ranked best among famous kinds during the Song Dynasty (960-1279), Ru porcelain is known for its unique pale blue glaze (釉). Oceans     2     Ru porcelain flooded onto the market around the year of 1100, but the     3     (exist) of Ru ware now is actually rare. Thanks to the efforts of Ru porcelain inheritors, people can now appreciate it     4     (close) at hand than before.

Born in Ruzhou, Henan province, Li Chao has spent a decade     5     (better) crafting skills. Ru porcelain goes through 72 steps, the    6     (one) of which is knead (揉) mud. Any small errors could lead to disaster, said the 41-year-old inheritor. He then stressed that a Ru porcelain inheritor must be patient enough. Every item of artwork     7     (full) deserves our admiration.

Techniques of making Ru porcelain will     8     (lose) with senior inheritors gradually passing away. So,     9     Li spares no effort in doing is introducing it to wider masses.     10     (achieve) this goal, he creatively uses Ru porcelain in making daily ware popular among young people. Now he’s aiming to expand the market by introducing it to the whole world.

In China, the use and cultivation (种植) of green tea goes back thousands of years. While there is no precise way to know     1    (exact) when green tea was first cultivated, the following is     2    we know from historical records.

Legend assigns the discovery of tea to mythological emperor Shennong, who is said     3    (discover) tea in the 28th century BC. Shennong was sitting under a tea tree boiling a pot of water to drink. Some     4    (leaf) fell from the tree into the boiling water, creating the first ever pot of tea. During the Han Dynasty, written records referred     5    the cultivation of green tea. However, this wasn`t green tea for drinking     6    for medical purposes. The Tang Dynasty     7    (consider) by most to be the golden age of Chinese arts and culture. It was during this time that green tea became a popular drink and an important part of     8    (tradition) Chinese culture.

    9    first written account of tea culture, Cha jing or The Classic of Tea, was published by Lu Yu. This short but comprehensive work,     10    (cover) ten chapters, discusses everything from the mythological of tea, history, cultivation, preparation to tea culture.

Bird-watching is one of the activities offered by the public benefit program “Park Classes”, which     1     (launch) in the city of Wuhan in 2016.

The program aims to help raise the awareness of environmental     2     (protect) among primary and middle school students, and to help     3     (child) get close to nature through a variety of outdoor activities developing their ability to explore and take action.

Among the courses on offer     4     (be) the restoration of small and micro wetlands,     5     requires a considerable amount of hands-on practice. Under the guidance of tutors, students are required     6     (conduct) research on a 500-square-meter wetland in a city park, and then take action to promote     7     (it) restoration.

Last summer, a team of 15 students conducted a physical examination of the biodiversity of     8     micro-wetland in Wuhan’s Houxianghe park. During their field research, the team found that there were few fish in the micro-wetland. After further study, they concluded that the problem is     9     (large) due to the lack of submerged (水下的) and floating plants, which kept fish and amphibians     10     reproducing in large groups.

The activity was meaningful and the students learned a lot and they are expecting to take more chances like this.

Martial arts refer to any of the traditional forms of Asian self-defence or combat that use physical skill and collaboration     1     weapons. There are different forms of martial arts such as Kungfu and Taekwondo. As a martial arts     2     (enthusiasm), I find it fun and exciting. They have had an effect of socially     3     (empower) me and have improved my health and wellbeing. Apart from this, I have observed that traditional martial arts can play a crucial role in our daily lives once we     4     (equip) with the necessary self-defence skills. Of late, domestic violence and abuse cases     5     (increase) globally and in most cases, the victims are women and youngers, of     6     most are usually in a disadvantaged position as the     7     (major) of them possess little to no self-defence skills. It can therefore be useful for people to learn and practice martial arts to be able to physically defend     8     (they). I feel martial arts have a role to play in the civil and modern society as they are     9     safer option of self-defence, compared to using weapons as defence mechanisms. Under any form of physical attack, I find traditional martial arts as perhaps one of the     10     (cheap) to fight perpetrator.

Xi Jinping, general secretary of the Communis Party of China Central Committee, led the new top leadership of the CPC to Yan’ an,     1     old revolutionary base in Shaanxi Province, on Thursday.

The trip, which took place five days     2     the conclusion of the 20th CPC National Congress,     3     (consider) to be a demonstration(证明)of the CPC top leadership’s strong determination     4     (carry) on the Party’s fine traditions to make new progress on the new journey toward     5     (realize) national rejuvenation(复兴).

Led by Xi, the other six       6     (new) elected members of the Standing Committee of the Political Bureau of the CPC Central Committee visited the site     7     the seventh CPC National Congress was held in 1945, an exhibition at the Yan’ an Revolutionary Memorial Hall,     8     (feature) the history of the time during which the CPC Central Committee     9    (base) in Yan’ an achieved from 1935 to 1948.

Xi said that the trip was made to recollect the glorious period in which the Party developed in Yan’ an, reminisce(缅怀)about the splendid achievements of the older generation of     10     (revolutionary), carry on the great spirit of the Party, and firm up historical confidence in order to try to achieve the goals and tasks set out at the 20th CPC National Congress.

Eat or heat?

No more ironing, limited oven use and showering at work—Europeans are trying to keep energy use down but the bills still keep climbing. Costs of energy for British consumers will rise by 80% from October,    1     will take the average annual household bills to ￡3, 549. This makes the energy crisis severer than    2     of the 1970s and 1980s.

Keetley    3     (lose) his job as a council adviser in April and lives on ￡600 a month from a social security scheme. Half of that goes on rent, he said, with the remainder barely covering the     4       (essential). He now eats one meal a day and although he has reduced energy consumption to a minimum, he spends more than 15% of his income on energy bills. “    5     cost of living has increased and yet you are expected to live on the money    6     (provide) for when there wasn’t a crisis... I either can have my heating on or eat,” Keetley said.

A household is defined as living in fuel poverty if it is low income and needs to spend 10% or even    7       (much) of its income on energy, according to UK charity National Energy Action and other British charities. Experts agree that despite this     8       (be) a hard season, Europe will       9       (undoubted) make it through the winter, but the concern is    10     will happen next year.