第二节 根据短文内容，从选项中选出能填入空白处的最佳选项（其中有两项为多余选项）。
Do you like blue whales(鲸) and kangaroos（袋鼠）? Do you know about them? Now let me introduce them to you. Well, the blue whales are very beautiful animals in the world.
16. They have a big body.
17. They feed on small fishes and other sea animals. Kangaroos live in Australia. They are very famous because of their looks and the way they walk. 18. Their front legs are also small, but their back legs are very large. They also have long tails.
But blue whales are in great danger（危险）. People make water dirty（脏的）. A lot of sea animals can’t live in it. People also kill（杀死） the blue whales for meat（肉） and oil（油）. 19. Some of them live in the places where there isn’t much water. 20. So kangaroos have little food to eat. Blue whales and kangaroos are our friends. We should do our best to care for（照料） them.
A. I love blue whales very much.
B. They have small heads.
C. They live in the sea.
D. Trees and grass can’t grow well.
E. They are important to us.
F. But they swim very fast.
G. Kangaroos are in great danger, too.

16. C 17. F 18. B 19. G 20. D