五、阅读理解
Animals grow up in different ways. Some newborn(新生的) animals are helpless but their mothers protect them. A newborn kangaroo(袋鼠) is very small. It is only a few centimetres(厘米) long. It closes its eyes and doesn't have hair. It stays safe in
its mother's pouch(育儿袋) for a long time. A newborn monkey cannot walk. Its mother carries it everywhere. Other baby animals can walk soon after they're born. They learn to run with their mothers when danger is near. A baby zebra(斑马) can run, an hour after it is born.
Some baby animals are born in a place that is safe. Baby wolves are usually born in big holes with little light. Other baby animals are born in the open. A baby elephant is often born on open land.
Animals that drink their mothers' milk are called mammals(哺乳动物). A mother bear's milk is rich(丰富的). Baby bears have milk for a few months. This is the same as baby zebras. As baby animals grow, they need solid(固体的) food. Baby lions eat what their mothers can catch.
31. According to the passage, many newborn animals need their mothers' help because the babies can't .
A. look after themselves
B. eat any food
C. walk by themselves
D. sleep alone
32. Baby wolves are usually born in a(n) place.
A. open
B. bright
C. safe
D. dangerous
33. Newborn mammals' main food is .
A. mother's milk
B. solid food
C. smaller animals
D. plants

31. A 32. C 33. A