Have you heard of dodos (渡渡鸟)? The dodo was a(n)     1     of bird that was very large. You might not think it was a bird at all because the dodo could not fly. It lived happily and     2     until people arrived.

European sailors (水手) found those birds in the 16th century on Mauritius Island in     3     Indian Ocean. When the sailors found the strange birds that could not fly, they were     4    . The Europeans on Mauritius Island found the birds very delicious. So large numbers of dodos were     5     and no living dodos were found on the island in the following     6    . Later, the samples (标本) of some dodos were brought to England in the 17th century for the future study.

    7     fact, the extinction (灭绝) of dodos was caused by people. This was how the phrase “as dead as a dodo” came. It teaches     8     a big lesson.     9     we are not able to get along with nature, we will lose the things more than we would expect. We should     10     action to protect them. We should also stop the activities that will be bad for the environment or other animals.

Most people love animals. Many children’s books use animals as the main characters (角色). Many people look after animals as pets. Do you know     1     people enjoy going to zoos? The love for animals may     2     the reason.

In the past, zoos were usually started by rich (富有的) people. The     3     zoo was started by a queen (王后) in Egypt in 1500 BC. Sadly, the animals in the early zoos were not treated well. They didn’t receive (收到)     4     attention or care.

Today, zoos still bring people pleasure,     5     they try to protect animals and teach people as well. Zoos must follow rules. People must provide animals     6     a clean place to live, food and water, and health care. In this way, the rules help protect the animals.

Some people think the     7     are not enough. They want to do more to protect the animals they love. For example, people were against the use of some large animals in shows. They thought the zoos didn’t have enough     8     for the animals to show. With so many people against the shows, the zoos     9     to make a change.

People see animals in zoos. At the same time, they try to learn about and protect     10    . Both people and animals can get a lot from each other.