Most people love animals. Many children’s books use animals as the main characters. Many people look after animals as pets. The love for animals may be why both children and adults (成年人) enjoy going to zoos.

In the past, zoos were usually started by rich people. The first zoo was started by a queen in Egypt in 1500 BC. Raising animals was a way for people to show they were wealthy and powerful. Sadly, the animals in the early zoos were not treated well. They didn’t receive enough attention or care.

Today, zoos still bring people pleasure, but they try to protect animals and teach people as well. Zoos must follow rules. People must provide animals with a clean place to live, food and water, and health care. In this way, the rules help protect the animals.

Some people think the rules are not enough. They want to do more to protect the animals they love. For example, people disapproved of the use of some large animals in shows. They thought the zoos didn’t have enough space for the animals to show. They also thought the animals were not treated properly. With so many people against the shows, the zoos decided to make a change.

People see animals in zoos. At the same time, they try to learn about and protect them. Both people and animals can get a lot from each other.

It is healthy to live around trees. Trees work as doctors and they keep us healthy.

Many scientists have studied how trees clean the air. For people in large cities, trees can be very important for their health. These days, cities are planting trees not just in parks. They are also planting trees along streets in order to help clean the air.

Some scientists also believe trees help more than just the air. Trees keep our bodies healthy as well. People in hospitals seem to do better when they can see trees from their rooms. People with trees near their homes usually take more exercise.

Scientists have also studied the healthy effects (效果) of trees on our minds. One effect of trees seems to be that they make people feel relaxed. Scientists did some research on city people in an area with few trees. After trees were planted on the street, people walked slower when going home. They said the area was much nicer.

Of course, another good effect is that doctor trees work for free!

A smile shows that a person is happy. For example, a person may smile when he or she is p    56     with some progress in studies. Or a person may smile if a friend tells a funny joke. There are other good r    57     to smile often.

First, it is e    58     to smile than to show unhappiness. In fact, it only takes 17 muscles (肌肉) to smile. On the other hand, it takes 43 muscles to show unhappiness. So give the muscles in your f    59     a rest and smile!

Second, smiles are nice. People may try to l    60     nice by exercising or wearing nice clothes. However, people often say a smile is the best thing a person can wear. That is because it is easy to be a    61     someone who is smiling and happy. Almost no one wants to stay with someone who is always unhappy.

Third, smiles have power (感染力). Both smiling and laughing can easily and quickly s    62     from one person to another. If one person smiles, people around him or her want to smile, too. Similarly, when a person laughs, people tend (往往会) to laugh with him or her. If a person is s    63    , the best thing to do is to share a smile or a laugh. It is the easiest way to cheer someone up.

F    64    , smiling and laughing are very good for the body. Even though you are sad, try smiling. You’ll find that it will be difficult to s    65     sad for very long!

66. 假如你是李华，请根据以下提示，给你的笔友Peter用英文写一封邮件，向他讲述你班同学王亮的一个感人故事。

How is everything going? I’d like to tell you a story about my classmate, Wang Liang.

On a rainy day, ____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Do you have a story to share? Looking forward to your reply!

Yours,

Li Hua