Are we a    1    ? What’s out there ?” Looking up at the s    2     , people have always wanted to l    3    more about space , and scientists work h     4    to find answers . They m    5     vehicles to carry b     6     people into space to find out the s    7     of the universe.They also really wish to d    8     other planets that are s    9    enough to s    10     life .

“Are you alone? What’s out there?” L    1     up at the stars, people have always wanted to learn more about space, and scientists work hard to find answers. They make v    2     to carry brave people into space to f    3     out the secrets of the u    4    . They also really wish to discover other planets that are s    5     enough to support life.

Before the mid-20th century, most people felt travelling into space was an i    6     dream. However, some scientists were determined to help humans realize their d    7     to explore space. After many experiments, they s    8     in making rockets that could e    9     Earth’s gravity. On 4 October 1957, the Sputnik I satellite was l    10     by the USSR and successfully orbited around the Earth.

When Michael Jordan’s feet left the ground, time seemed to stand     1    . The player who became known as “Air Jordan” changed basketball with his     2     moves and jumps. Jordan’s skills were impressive, but the     3    strength that he showed made him     4    . In the final seconds of a game, Jordan always seemed to find a way to win. Jordan says that the secret to his success is     5     from his failures. “I can accept failure; everyone fails at something. But I can’t accept not trying.” Losing games taught him to practise     6    and never give up. In life, Jordan has learnt to share his success with others. The Boys and Girls Club     7     he started in Chicago has been young people since 1996.

At the beginning,     8     Chinese was a picture-based language. It dates back several thousand years     9    the use of animal     10     and shells on which symbols were     11     by ancient Chinese people. Some of the ancient symbols can still be seen in today's Hanzi.

By the Shang Dynasty, these symbols had become     12    well-developed writing system. Over the years, the system developed into different forms,     13     it was a time when people were divided geographically,     14    to many varieties of dialects and characters. This,     15    , changed under the Emperor Qinshihuang of the Qin Dynasty (221-207BCE).

Christopher Reeve is not only known as a superhero in the Superman films, but also regarded a superhero in real life. Reeve     1     in four Superman films from 1978 to 1987, and soon gained a reputation for     2     for good causes. Unfortunately, in 1995 disaster struck Reeve. While horseback riding, he was thrown off his horse and broke his neck. His injuries were so     3     that he had no movement or feeling in his body at all and even needed a machine to help him breathe.     4     in a broken body was like a living nightmare to him. He fell into a     5     which lasted for many months. It was only     6     the ongoing support of his family and friends that he eventually found the will to live again. He     7     a wide range of exercises designed to rebuild muscle, and made     8    . Shortly after, he     9     return to his film career and charity work. His positive attitude inspired many people who were     10     illness.