We go to school ________ 6∶50________ the morning.

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　　Mozart（莫扎特）was born on January 27, 1756 and died on December 5, 1791. When he was three, he often had lessons with his elder sister. His father took him through many different countries, and he played music for lots of people there. But some people didn't believe that a little boy could write such beautiful music. They asked him to stay in a room all by himself for a week and somebody watched the room all the time. In the week, he finished a new piece of music. After that, people believed that he could write beautiful music.

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　　Many people like to keep dogs as their pets. But do you know dogs were wild（野生的）animals long, long ago?

　　The (1) wild dogs were trained by (2) in Europe about 10,000 years ago. These first“dogs” were not like (3) we have now. They may have been small wolves. These dogs often came near humans to (4) some food. Some of the young dogs were adopted（收养）by people and grew up with them.

　　Humans believed the (5) were a help to them in many ways. The dogs helped them to hunt（守猪）. They could smell and hear danger (6) people could. They helped keep people (7) on cold nights. So it was (8) to raise the dogs.