Chengdu is regarded by many as one of the happiest cities in China, as well as the home of pandas. It     1     (become) the first Asian city to be identified as a UNESCO City of Gastronomy in 2010.

Chengdu is a place where it seems to blur (难以区分) the boundaries between past and future. Its ancient temples, traditional alleys and historic architecture open a window into ancient China,     2     (take) you into a world of past impressive beauty. But what is really surprising is its focus on the future. Transforming into a center of technology, innovation and development, this city has     3     (ambition) plans to become a science city in southwest China.

Chengdu is not only rich in history and modernity, but also in flavor. This city is known     4     its spicy food, with bold flavors and centuries-old cooking traditions coming together to offer dining experiences     5     will delight all the senses. Chengdu’s most popular food, such as tongue-numbing mapo tofu and hotpot, is     6     feast for the palate (味觉). Hotpot works like this. A heat source     7     (place) on the dining table keeps a pot of soup stock simmering (煨), and a variety of Chinese foodstuffs and     8     (ingredient) are served beside the pot for the diners to put into the hot stock.

All this richness that Chengdu has to offer led to its selection as the host city for the 31stFISU World University Games. The athletic event was an opportunity not only     9     (show) Chengdu’s sporting spirit, world-class infrastructure,     10     (warm) and organizational skill, but also to promote friendship and cross-cultural understanding.

At a time when we are all experiencing an extraordinary level of stress, science offers a simple and effective way to improve our own emotional （情感的）health.

To help yourself,     1    （ start） by helping others.

As     2     matter of fact, our bodies and minds benefit in a variety of     3    （ way）when we help others. Some research has focused     4     the “ helper's high. " Studies show that volunteering, donating money, or even just thinking about donating money can release （释 放）feel-good brain chemicals.

    5     （feel） responsible for other people also can help us deal with whatever challenges life brings. Emily Greenfield, an associate     6    （ consult） of social work at Rutgers

University, studied a concept called “felt obligation （义务），”   which     7     （measure） by asking people questions such as how obligated they would feel to give money to a friend in need, even     8     it meant putting themselves in trouble.

As it turned out, the people who had higher levels of “felt obligation” - meaning they were the type of people to sacrifice for others - dealt     9    （ well） with their own life challenges than others.

She     10     （note） that caring for others helped us to regulate our own emotions and gain a sense of control.

You may remember back at the start of December,     1     China carried out their unmanned Chang’e-5 mission and the spacecraft touched down on the moon to collect samples for research. Now it     2    (success) returned to the Earth. This is the most significant event in China’s space field, and also one of the most notable space     3    (activity) globally. Chang’e-5,     4     (launch) by a Long March 5 heavy-lift carrier rocket early on Nov 24, is the nation’s     5    (large) and most complex lunar probe. It returned with 1,731 grams of lunar rock and soil to the Earth,     6    (mark) a historic accomplishment 44 years after the last lunar substances were taken back. The 23-day mission was China’s first space journey to claim extraterrestrial samples, making     7     the third country to accomplish the task, the first being the USA in the 1960’s and the second Soviet Union in the 1970’s.

The spacecraft     8    (enter) the Earth’s atmosphere at an altitude of around 120km. As soon as it was 10km above land, it released its parachute and landed smoothly in China's Inner Mongolia. Now the spacecraft has been air lifted to Beijing where the samples     9    (examine) by scientists very soon.

The mission’s results will contribute     10     mankind’s deeper understanding of the moon’s origins and the evolution of the solar system.