Imagine having the     1     to sing together with hundreds of other people while you are at home alone. You can do this in a virtual choir. Virtual choir members record themselves while they perform alone on video. These videos are uploaded onto the Internet, and then they are put     2     into one video that you can see online—a virtual choir. Anyone can take part in a virtual choir from anywhere—all you need is a video camera and an Internet     3    . You do not even need a     4    . A virtual choir helps connect     5     people together. Many people do not have close friends or     6     who have the same interest in music. Many others do not have the chance to join a local choir. A virtual choir     7     them to add their voices to those of other     8     and become part of the global community. It has     9     to be a positive influence on the lives of many people. As one virtual choir member said, “Music helps me to … forget my problems. With music, I become someone     10    .”

As a player, Lang Ping brought honour and     1     to her country. As a coach, she led the China women’s volleyball team to     2     at world championships and the Olympics. As a person, Lang Ping is loved by fans     3         4         5         6    . When the Chinese team was preparing for the 2015 World Cup, her determination was     7    . The team that Lang ping had built was     8         9    . One of the best players had been     10    , and the team captain had to leave     11         12     heart problems. Losing two important players was a big     13    , but Lang Ping did not     14         15    . She had faced difficulties before, and she knew that her young players could win if they     16         17     as a team. Two weeks later, they were world champions! Then in 2016, Lang Ping led her volleyball team to Olympic gold in Brazil.

I recommend that you talk to your friend about his behavior. It is not unusual for teenagers of your generation to     1     computer games and the online world. But spending too much time online is unhealthy and makes it very difficult to focus on other things in life. Some students even     2     the Internet and cannot     3     school and family life.

Emperor Qinshihuang united the seven major states into one     1     country where the Chinese writing system began to develop     2     one direction. That writing system was of great     3     in uniting the Chinese people and culture. Even today, no matter where Chinese people live or     4     dialect they speak, they can all still communicate in writing.

Written Chinese has also become an important     5     by which China’s present is connected with its past. People in modern times can read the     6     works which were written by Chinese in ancient times. The high regard for the Chinese writing system can be     7     in the development of Chinese characters as an art form, known as Chinese     8     . which has become an important part of Chinese culture.

    9     China plays a greater role in global affairs, an increasing number of international students are beginning to     10     China’s culture and history through this amazing language.

Before the mid-20th century, most people felt travelling into space was an     1     dream. However, some scientists were determined to help     2     realise their dream to explore space. After many     3    , they succeeded in making rockets that could     4     Earth’s gravity. On 4 October 1957, the Sputnik 1 satellite was launched by the USSR and successfully orbited around Earth.    5    , the USSR focused on sending people into space, and on 12 April 1961, Yuri Gagarin became the     6     person in the world to go into space. Over eight years later, on 20 July 1969, American     7    Neil Armstrong stepped onto the moon,     8     saying, “That’s one small step for a man, one giant     9     for mankind.” Following this, many more goals were achieved. For example, America’s NASA space agency launched Voyager 1 on 5 September 1977 to study deep space, and it still transmits     10     today.

This year’s Nobel Prize for Physiology or Medicine     1     Tu Youyou, whose research led to the discovery of artemisinin,     2     for malaria. Artemisinin has saved hundreds of thousands of lives, and has     3     for millions of people.

These smart homes will keep us secure, save us energy, and     4     .

Many of these new innovations     5     in some homes.

This four-day     1     tour will take you on amazing     2     through the Andes Mountains on the way to the city of Machu Picchu.     3     reaching your     4    , you will have a day to     5     and be amazed by this     6     city.     7     amazing is the Incas’ dry stone method of building. Inca builders cut stones     8     exact sizes so that nothing was     9     to hold walls together other than the perfect     10     of the stones.