Do you like eating chocolate chip cookie？Thanks to Ruth Wakefield, they were invented by accident in 1930.

    Ruth and her husband owned a restaurant called the Toll House. As manager and cook, Ruth kept very busy. One day in 1930, she was making some chocolate butter cookies．It was required that she should melt chocolate into the dough (面团)．However, she found that she had run out of baker's chocolate. So she had to break some semi­sweet chocolate (半甜巧克力) into small pieces and added them to the dough. She hoped these pieces of chocolate to melt.

    After the cookies were baked (烤), to her surprise, the chocolate had not melted into the dough, and her cookies were not chocolate butter cookies. They smelt delicious. They tasted sweet and crispy．

    They were named Toll House cookies after Ruth's restaurant and are the most popular cookies in America today. About seven billion chocolate chip cookies are eaten every year, and nearly half the cookies baked in American homes are chocolate chip cookies.

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    Bird lovers know that a good place to go bird-watching is Guandu Nature Park. As many as 220 kinds of birds come to this park every year. Since the park offers birds lots of food to eat and places to build their nests, it has become a paradise（天堂）for birds.

    Guandu Nature Park is also a great outdoor classroom. The park's Nature Center provides guided tours to the public. During the tour, visitors can learn about the environment. So, if you want to have a fun and educational weekend, come to Guandu Nature Park. Get away from city life and head into nature.

    Liao Yifeng, a police officer working in a small village in Wuhan, is a "father" to 39 "left-behind" children, whose parents are working far away from home and seldom spend time with them.

    Wan Tianle, an 8-year-old boy, was the first to call Liao "Dad". Wan's parents divorced when he was only 6 months old. Ile never saw his mother again and his father later disappeared after getting into debt. When Liao learned that the boy couldn't even afford the 100 yuan monthly school living fees,   ①   , bringing 100 yuan.

    During last year's Mid-Autumn Festival, Liao carried a kilo of meat and pig's feet to his home. After dinner, the boy put his arm around Liao's neck and asked sweetly, "Uncle Liao, can I call you daddy?" Liao was deeply moved,    ②   .

    With a 2-year-old son of his own, Liao said he knew how important a father's love was to a child.

    In Wan Tianle's school, there are 407 left-behind children. With the help of teachers, Liao knows clearly each child's home conditions and pays more attention to the 39 children whose families are the poorest.

    Liao has built a special room named "family love room" in the police station, where Liao helped these left-behind children with their homework and taught them about safety in his spare time.

    Moreover, a computer in the "family love room" plays an indispensable role because it offers a precious opportunity for Liao to help children whose parents are working far away to chat with them online.

    A bottle of water may not seem much to you, but thousands of bottles will be of great help for people who live in drought-hit areas in China.

    Since last autumn, there has been very little rain in Southwest China. Some places, especially in Yunnan, Guangxi, Sichuan and Guizhou, have experienced a serious drought. Crops died, the land cracked(裂开) and wells and rivers died up. More than 20 million people are having difficulty finding safe drinking water.

    After learning about the drought, many people around the country helped by giving water, money and other things.

    The serious drought has also made students realize the importance of saving water. Students from Nanshan Middle School in Huizhou, Guangdong, went on to the street to tell people to take part in water-saving activities.

    "I've heard that some children in drought-hit areas don't have enough drinking water. I feel really sad about that," said one student. "I decided to take a shower twice a week instead of every day to save water." He said.

Should We Keep Animals In Zoos?

    Zoos are popular places in communities around the world. They're places where people can learn about wild animals by seeing them up close. Some people  though, believe zoos aren't good for animals. They think wild animals should only live in the wild.

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    Wild animals have been kept in cages for thousands years. Over time, people began speaking out about the practice of keeping animals in zoos. The rise of animal rights movement and groups have led many to question whether or not zoos are right.

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    Zoos provide care for animals that they wouldn't receive in the wild. Animals are fed a healthy diet in zoos. Also, zoos have veterinarians who provide medical care for hurt or sick animals that would often be left to die in the wild. In some cases, zoos help animals to live longer.

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    Though many animals live longer in zoos, some mammals live longer in the wild. Elephants live near twice as long in the wild as they do in zoos. Scientists believe the causes for this include elephants in zoos becoming stressed and depressed when they are forced to live in small spaces.

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    It may seem like a good thing that zoos set animals back into the wild, but there are often problems with this practice. Zoo animals don't learn hunting skills since they are fed by zookeepers. They also have no idea to stay away from predators, cars or hunters in the wild.

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    How much do zoos actually teach people about animals? A 2014 study showed that only 1000 out of 3000 children who visited a zoo learned something new. Groups such as PETA believe the biggest thing children learnt at zoos is that it's fine to keep animals in cages instead of in the wild.