Emerging evidence in humans suggests a     1     (typical) Western high-fat, high-sugar junk food diet can quickly weaken your brain's appetite control.

After offering volunteers a week-long binge (大吃大喝) of waffles, milkshakes and similarly rich foods, researchers in Australia found young and healthy ones scored worse on memory tests and experienced a     2     (great) desire to eat junk food, even when they were already full.

The findings suggest something is special in the hippocampus (海马体)-a region of the brain     3     supports memory and helps to regulate appetite. When we are full, the hippocampus is thought to quieten down our memories of delicious food, thereby     4     (reduce) our appetite. When it’s interrupted,     5     control can be seriously damaged. Over the years, extensive research on     6     (mouse) has found the function of the hippocampus is very sensitive to junk food, but recently this has been observed only in young and healthy humans.

In 2017, after a week of Western-style breakfasts of     7     (toast) sandwiches and milkshakes, researchers found participants performed worse on learning and memory tests which are typically dependent     8     the hippocampus.

Now, in this latest study the scientists of the team     9     (find) that not only do such high-fat, high-sugar diets impair memory in humans, but they appear to directly affect our ability     10     (control) our appetite.

Chinese astronauts in Tiangong space station opened a science lecture on December 9th, 2021 as they traveled around     1     Earth.

There     2     （be）a lecture and some interesting activities on that exciting day. First, Zhai Zhigang, Wang Yaping and Ye Guangfu, all members of the Shenzhou XIII mission crew, greeted students, teachers and other participants as the lecture began at 3:40 pm. They then showed viewers the place     3     they live and work. The astronauts carried out experiments     4     （show）interesting physical phenomena（现象）in space,     5     （include） "disappearing buoyancy（浮力）" and a "water ball". At last, before the end of the livestreamed activities, they     6     （happy）answered questions from students.     7     （million）of primary and middle school students across China watched the 60-minute televised event, which was the first lecture of the Tiangong Class, China' s first extraterrestrial（地球大气圈外的）lecture series to make students interested     8     space science.

The manned space agency said that more lectures would     9     （hold）based on the country's manned spaceflights and would also be presented by some     10     （profession）Chinese astronauts. Such activities are intended to spread knowledge about manned spaceflights for science among young people.

What is culture? Culture is the shared characteristics and knowledge of a group of people,     1     (include) their language, religion, food, social habits. music and arts. The word “culture” has     2     (it) root from the Latin “culture”, which is related to the meaning of “growth”.

A number of historical events     3     (help) shape Western culture in the past 2,500 years. The fall of Rome cleared the way for the establishment of a series of states in Europe. The Black Death of the 1300 cut the population of Europe by one-third,     4     remade the society. Gradually, Christianity became the     5     (strong) of all religions in Europe. Then the trade between East and West allowed Europeans to explore North and South America.

Eastern culture generally refers to the traditions in Asian     6     (country). Like the West, Eastern culture was heavily influenced by religion during its early development, but later it     7     (influence) by the agricultural development significantly.

    8     culture differs from area to area, one thing is for certain: Cultures change. “Culture plays     9     important role in our interconnected world,” De Rossi said. “But it is no longer fixed. Culture is     10     (constant) moving and essentially fluid.”

It is reported that at present a city in Japan has a problem with graffiti(涂鸦). However, it is not the usual type of graffiti with paint from spray cans     1    (use) to write on walls. It is graffiti in sand.

Officials in the city of Tottori are asking tourists to give up     2     (write) messages and drawing pictures in the sand of its giant sand dunes (沙丘). The officials say the graffiti causes damage to the dunes,     3     destroys the pleasure others get in looking at the sand.

More than 3,300 cases of "sand graffiti"     4     (occur) at the tourist spot in the past decade. In January, two overseas tourists were ordered     5     (erase) a 25-meter-long message that read "Happy Birthday Natalie".

The Tottori Sand Dunes are famous throughout Japan     6     their natural beauty. They are the largest and longest sand dunes in the country and form part of     7     scenic coastal park on the sea of Japan coast. The biggest dune is 50 meters high.

The local government wants to improve tourists' understanding of the     8     (important) of the dunes. It will set up much     9     (many) signs in English, Chinese and Korean asking people to respect the dunes. A spokesman said, "We are concerned about whether the rules are     10     (complete) understood, and we want to continue to protect views of the beautiful sand dunes."

At eight p.m., February 17, 2021, 2020 “Touching China” was broadcast on CCTV integrated channel CCTV-1. The “Touching China” award has been held every year since 2003,     1     honors ten of China’s role models carefully     2    (select) by people.

One of the ten role models, wang Hai, is a former MiG-15 fighter pilot and air force     3    (command) who led the People’s Air Force’s young No. 1 Brigade and fought more than 80 fierce     4    (battle)with the US Air Force during the War, to Resist US Aggression, and Aid Korea. And Ye Jiaying is an expert of Chinese Classical Literature     5    (make) a significant contribution to the spread of Chinese culture. There is no doubt that those extraordinary people can have an outstanding influence    6    our country. However, even nobodies can burst out with great power.

Wan Zuocheng and Xiong Gengxiang are     7     ordinary couple living in Nanchang, Jiangxi. They     8    (operate) an open-air kitchen near Jiangxi Cancer Hospital since 2003 to offer a helping hand to cancer patients. So far this kitchen has not only witnessed the joys and sorrows of a large quantity of people over the past eighteen years, but also     9    (continuous) conveyed the love and warmth of home. The couple’s initial intentions were very simple: “Some diseases can’t     10    (cure), but the patients can eat better, and the family members can have less regret.”