Farming in the USA today is very different from that 100 years ago. In those days, farmers did not have many machines to help them. They had animals. {#blank#}1{#/blank#}This meant that farms were smaller than they are now. Farmers also worked in a different way in the past. In those days, farmers grew fruits and vegetables and kept cows, pigs and chickens to feed their families. {#blank#}2{#/blank#}

    Farmers have a very special life in many ways. First of all, they can't leave the job at the end of the day. They live on the farm and there is always work to do. Second, a lot of farm work is outdoors, so the weather is very important for farmers. {#blank#}3{#/blank#} A lot of bad weather means farmers will lose money. Finally, farmers work with plants and animals. They understand nature better than other people do.

    {#blank#}4{#/blank#} Spring is a time for planting. Farmers are busy getting the fields ready and then planting the seeds(种子). In summer, farmers must take good care of the plants. Some may need water. Other plants may have problems with insects or diseases. Then in fall, the fruits or plants are ready for picking. {#blank#}5{#/blank#} Winter is a time for rest or for work on the farm machines.

A. Farm work changes with the seasons.

B. That is a very busy time for farmers.

C. But animals work slowly compared to machines.

D. It is also important for the success of their farms.

E. Today farmers grow things on the farms so they can sell them.

    It's important for each of us to be healthy and happy. Do you want to improve (改善) your health and feel better? Here are some ways.

    Eat whole foods. Eat some healthy foods, such as fruits, vegetables, nuts and a little meat. If you have a healthy eating habit, you'll be happier.

    Exercise. Take up a sport you really like. If you want to keep healthy, try to exercise for 30 minutes a day, twice or three times a week.

    Get enough sleep. It is best to get eight hours' sleep a day. A cup of milk before sleeping may help you get a good sleep.

    Keep yourself busy. This is very good because it stops you from having bad habits. To keep yourself busy, you can walk around the house, spend time with your pets, do sports, or do a hobby you enjoy.

    Spend time with your friends. Spend time and have fun with them. Talk with them. But you shouldn't talk about anything bad. You should stay with the people who are healthy and happy.

    Fire was discovered many thousands of years ago. The first time humans saw fire was probably when a tree was destroyed by lightning(闪电).Humans soon learned how to make a fire. They probably made the first fire by rubbing (摩擦)two sticks together. Fire was very important to humans. They needed fire to keep warm at night. They used fire to cook food. ⑶They used fire to keep enemies and wild animals away. In some parts of the world fire was used to send messages. The Indians in America, for example, used fire to make smoke as a message. In some other countries people lit fires to warn their friends of danger. ⑷Fire was also used to give light. Before the invention of the oil lamp(灯), humans burned sticks to get light. One man even used fire to tell the time. He invented a candle clock. He made a candle that took exactly twelve hours to burn. Then he marked this candle in twelve equal(相等的) parts. He lit the candle and could tell the time by counting the number of parts left of the burning candle. But the candle clock did not always work well. If there was a wind blowing on the candle, it burned too quickly.