Playing with apps on smart phones is very common among young people. Let's try some special apps and enjoy them.

    Nearly 7,000 medical workers in the team supporting Central China's Hubei province left the capital, Wuhan, the hardest-hit city in the novel coronavirus outbreak in China, and went back to their hometowns on Tuesday, March 31, marking the largest scale departure (离开) of medics (医学工作者)since the first group left on March 17. The Civil Aviation Administration of China has organized 51 planes to support the departure.

    More than 42,000 medics from other parts of the country have joined the battle with local medics to fight against COVID-19. The support teams came from 21 provinces, cities and autonomous regions(自治区) and some of them worked on several battlefields during the past months. The support team from the First Hospital of China Medical University in Shenyang, was among those in the group. Sixty members were in charge of treating COVID-19 patients in 100 beds in the Union Hospital and treated 174 patients who have been seriously ill since they arrived on Feb 10.

    Wang Zhenning, the leader of its support team, expressed his thanks to the Wuhan people who offered great help to them. "I am proud to witness and play a role in history. We've been here, seen it happen and become better. Wuhan is our second hometown. We will forever care about the city and the people fighting with us." he said.

    Wuhan city government showed great thanks to all medics in a letter, expressing their gratefulness of the medics' efforts to save lives in the battle. "Thanks to your arrival, Wuhan welcomes today's peace and stability. We will always remember your kindness!" the letter said. In it, the city government also invited the medics to visit Wuhan in the future for sightseeing. Local people volunteered to line up and see medics off as the medics left for home after finishing their mission(使命) in Wuhan. Wuhan traffic police led the way for medics to the airport.

    The grand military parade (盛大阅兵式) and celebrations were held in Tian'anmen Square, Beijing on Oct. 1 for the 70th anniversary of the founding of the People's Republic of China.

    A grand military parade was held in the morning, showing the great progress made by the Chinese armed forces in recent years. About 15,000 officers and soldiers took part in the 80-minute parade in front of Tian'anmen Square. Then, a mass pageant(群众游行展) showing China's historical achievements and the nation's great rejuvenation(伟大复兴)was held. It was seen as a lesson on Chinese history and how far the nation has progressed. The mass pageant lasted 65 minutes and was divided into five parts, each part showed respect to Chinese leaders in the past and leaders now, from Mao Zedong to Xi Jinping. In the evening, a gala(盛会)took place in Tian'anmen Square. The songs, dances and fireworks celebrated the nation and its people.

    President Xi expressed warm National Day congratulations to Chinese people home and abroad. Standing on the Tian'anmen Rostrum in Beijing, where Chairman Mao Zedong announced the founding of the PRC on Oct 1, 1949, Xi recalled Chinese history. He also showed a road map for the country to realize the Chinese dream of national rejuvenation. He called for efforts to make a better life and to keep making achievements. The parade and celebrations have set off Chinese people's patriotism (爱国心)and a strong sense of pride.

A: Mr. Liu, can I ask you some questions about Mars?

B: Sure, go ahead.

A: Is Mars hot?

B: Mars might look red-hot. But don't let its color fool you. Mars is much farther away from the sun than Earth. So it gets less light and heat.

A: Why "Mars"?

B: Mars takes its name from the Roman god of war (罗马战神). In China, the red color makes people think of fire. So they call the planet "fire star".

A: Are there Martians on Mars?

B: Unluckily, we haven't found any "people" on Mars yet. They are kind of like Santa Clause. Nobody can see them, but many people believe they are real.

A: Will we lose weight on Mars?

B: Living on Mars could be good in many ways. For example, you might not need to go on a diet to lose weight. If you weigh 50kg on Earth, you will only weigh 19kg on Mars. This is because the surface gravity (表面重力) on Mars is only about 38 percent of that on Earth. Do you want to know your weight on Mars? Just multiply your weight by 0.38. That's it.

A: Thank you. We know a lot about Mars now.

B: You're welcome.

    As more information comes out about 10-year-old Cindy Smith's death(死亡), worries about amusement park safety(游乐场安全性) grow.

Cindy is not the first child who died on an amusement park ride. 25 years ago, the mother of a 14-year-old girl waited to pick up her daughter outside Worlds of Fun. Laura Barry never saw her daughter Rosie alive again.

"My heart goes out to the Smith family more than they can ever possibly know," said Barry. She is one of the few people who truly know the hurt that family is feeling.

In 1995, Rosie's mom said that something went wrong on the Timber Wolf the night Rosie died. Police found no evidence(证据). Two men told the police that they saw Rosie standing before she fell out of the car.

"I couldn't believe that such a thing could happen still and again," said Barry. She believes Rosie's death should have been a wakeup call for amusement park safety.

She finds that not much has changed in the past years. Amusement parks race to build bigger, taller, faster rides. In her opinion, amusement parks just try to bring in visitors and give them the idea that riding is good, safe and fun. She believes that parks should have put safety first.

There is no exact number of amusement park deaths each year. It is quite low according to some websites. But Barry doesn't accept that. "My daughter was the only person that had ever been killed at Worlds of Fun in all of the years, among all of the thousands and thousands of people that went there. The number doesn't mean anything, you know, because when your child is the one, that's one too many," she said.

下面材料是五则新闻报道。阅读这些新闻，从A-F选项中为每一条新闻选择一个恰当的标题，有一项是多余选项。

{#blank#}1{#/blank#}Drivers to Dapeng for the Qingming Festival holiday between Saturday and Monday will not have to order in advance. However, they will still need to ask for a spot for their vehicles to Shenzhen Fairy Lake Botanical Garden, police warned Thursday.

{#blank#}2{#/blank#}Drinking strong coffee — half an hour before exercise can increase fat-burning, according to a new study published in the Magazine of the International Society of Sports Nutrition(营养).

{#blank#}3{#/blank#}According to meteorological（气象学的） methods for calculating seasons, summer in the city likely began on, what might be the earliest date in this city's history, March 25, the Shenzhen Meteorological Observatory said yesterday.

{#blank#}4{#/blank#}Tokyo 2020 organizing committee(主委会) said that unlike the Olympic torch relay, which covers Japan's all 47 local governments, the Paralympics(残奥会) torch relay will only pass the four hosting regions of Tokyo, Shizuoka, Chiba and Saitama between Aug. 17 and 24.

{#blank#}5{#/blank#}Chinese musician Lyu Kanzhe will give a night of chiba music at the theater in MixC World. The chiba is one of the oldest Chinese woodwind instruments. It is a type of xiao, or flute. The shakuhachi is a Japanese chiba which was originally introduced to Japan from China in the eighth century and grew in the early Edo Period (1603-1868).