The light bulb has been called the most important invention since man-made fire. Thomas Alva Edison, born in 1847, will forever be remembered for his contributions to the light bulb. His mother, who was the making of him, knew that her son was fond of chemistry and electronics (电子学), so she gave him books to read on how to perform chemistry experiments at home at the age of 10. Thomas did every one in the book. He even set up a laboratory in 1859 and spent most of his time experimenting. Before he died in 1931, Edison patented 1,093 of his inventions, including the microphone, telephone receiver and electric pen etc.

What makes Edison’s contribution to electric lighting so extraordinary (卓越的) is that he didn’t stop with improving the bulb. In order to improve it, he tested tens of thousands of different materials to use for the filament (灯丝). Although he was often laughed, he finally showed the world’s first working light bulb in 1879 after making over ten thousand attempts.

Asked by a reporter, “How did it feel to fail 10,000 times?” Edison briefly replied, “I have not failed. I’ve just found 10,000 ways that won’t work.” He always stressed the importance of hard work and determination (决心). He never felt discouraged, or was likely to be hopeless of success.

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阅读下面短文，根据短文内容判断句子正误。正确的涂“A”，错误的涂“B”。

World Sleep Day fell on March 21 this year. And the theme was “Sleep equality for all people’s health”.

Chinese people sleep less than 7 hours every night, according to the result reported by the Chinese Sleep Research Society. Also, many Chinese people can’t sleep well.

What should we do? First, try to use an alarm with softer and lower sounds because it is never fun for people to be woken up by a ringing alarm. Second, sleep early and get up early. Some young people may go to bed late at 2 am and get up at 10 am. They think that as long as they have 8 hours of sleep, everything will be fine. But in fact, our bodies can tell time. They use light and temperature to do so. If we wake up too late, our bodies might feel stuck (困于) between sleep and being awake. That’s why we sometimes feel even more tired after oversleeping. So go to bed early and get up early. This is good for our health.

One of my favorite books is The Adventures of Tom Sawyer by Mark Twain. The story happens in a town in the US. It tells some exciting stories about a boy who has many adventures （冒险）.

Tom, the hero of the book, lives with his aunt. He does not like people telling him what to do, so he always get into trouble. One day, Tom discovers the secret of a bad man named Injun Joe, so the bad man is looking for him. Tom firstly runs away to an island in the middle of the Mississippi River. Later, he runs into a cave（山洞）with a friend. They find Injun Joe’s treasure box unexpectedly and arrive home safely with it.

My favorite part of the book is when Tom and his friend start their adventures on the island in the Mississippi River. At first, they are happy. But hearing that everyone thinks they are dead, they feel very sorry. So they come back home. When they suddenly appear, the family and neighbors are surprised to see them, but very pleased to find that they are alive.

The Adventures of Tom Sawyer is a great book. First of all, it tells a wonderful adventure story. It also tells how young people grow, how people love each other and how bad people p for their actions. It is written in everyday English, and the dialogues sound especially real. Today, it is still read and loved by people all over the world, and is thought to be one of the greatest American stories.