案例分析题
Koalas look like teddy bears， 1 they are not bears at all. They are really animals called marsupials. These animals carry their young in pouches， like kangaroos 2 .
Koalas live in the forests of Australia. They spend most of their lives in eucalyptus trees. They 3 never come down even for a drink of water. In fact， their names means “no drink.” The koalas have a 4 of knowing which trees they can feed on safely. They eat each leaf the same way.5 ， they bite the leaf off the stem and then they chew it from base to 6 .
When a koala is born， it is less than an inch long. The baby crawls into the mother’s
7 right away and stays there for six months. After that， the baby rides piggyback or hangs on 8 the mother’s front paws and legs. Young koalas stay with their mothers for at least a year.
The koala is a strong climber. Its paws end with sharp claws，9 he can get a good grip on tree branches. Koalas sleep in the eucalyptus trees on most of the day and eat at night. Koalas may live alone or in small 100 . Males sometimes use their sharp claws as weapons. Most of the time， koala families live together peacefully.