During the past summer vacation, a boy     1     Li Banghua from Hefei, made a model plane on his own in less than a month. Then he flew     2     successfully, which surprised all the people around him.

He made the plane completely     3     himself. The plane is 0.6 meters wide with a wingspan（翼展）of 4.4 meters and     4     about 40 kilograms. Li has been interested in model plane     5     he was a child. Besides, he has been studying and building model planes for years. This time     6     model plane is the largest one he has ever built and he considers it the most successful one.

During the process of building the     7     , he came across many difficulties. “But the     8     difficulty I had was short of understanding from adults”, Li said. “When I said I was going to build a model plane, a lot of adults thought it was impossible. But I decided to keep on working hard. That is because once I start something, no one can     9     me.”

When talking about his future, he said he dreamed of     10     a plane engineer. He wants to devote himself to our motherland.

Science and technology is developing these days. It’s hard to imagine what     1     (happen) in the future. When someone comes up with a new idea, inventors may use the idea     2     (create) a new invention. Can you imagine that you can play table tennis with a robot one day? And how interesting it is!

Recently, a scientist     3     (invent) a special robot that can be a table tennis coach. That means people can practice table tennis not only with     4     (human), but also with robots.

The robot can know the players’ skill levels when studying the speeds of the ball. While playing, it encourages players to try their best with words like “Good job!”, “Come on!” and so on. At the same time, it     5     (give) some good advice to improve skills. So it is both a good partner and a clever coach.

Laszlo Biro (1899—1985) was the inventor of the ballpoint pen. He was b    1     in Budapest, Hungary. In the 1930s, when he w    2     as a newspaper editor, he used a fountain pen almost every day. However, he had to refill it all the time. The ink also did not dry easily, and it sometimes made a mess on the paper. Biro wanted a better pen. His brother, George, helped him d    3     a special ink. The ink dried easily. Then they made a new type of pen. There was a tiny ball at the tip of the pen. The ball rolled ink onto paper as it moved. They called it the “ballpoint” pen.

The ballpoint pen was a g    4     success. Everyone loved it. Now millions of people use it all over the world every day.

People will always remember Biro for his i    5    . Today in many English-speaking countries, people still use the word “biro” to refer to any kind of ballpoint pen.