Koalas look like teddy bears,21______ they are not bears at all. They are really animals called marsupials.
These animals carry their young in pouches, like kangaroos 22______.
Koalas live in the forests of Australia. They spend most of their lives in eucalyptus trees. They 23______ never come down even for a drink of water. In fact, their names means “no drink.” The koalas have a 24______ of knowing which trees they can feed on safely. They eat each leaf the same way.25______, they bite the leaf off the stem and then they chew it from base to 26______.
When a koala is born, it is less than an inch long. The baby crawls into the mother’s 27______ right away and stays there for six months. After that, the baby rides piggyback or hangs on 28______ 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,29______ 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 30______. Males sometimes use their sharp claws as weapons. Most of the time, koala families live together peacefully.
21.
A.while B.but C.when D.however正确答案B
