聽材料，回答問題。
（1）How many kinds of kangaroos are there？
A.Twenty-seven.
B.Thirty-seven.
C.Forty-seven.
（2）How often does a kangaroo have a baby？
A.Twice a year.
B.Once a year.
C.Once every two years.
（3）What do kangaroos eat？
A.Fruit，leaves and grass.
B.Only grass.
C.Anything.