根据短文内容，将下面A—E五个句子分别填入文中空缺处，使补全后的短文意思通顺，结构完整。

(D)

There are many different kinds of animals in the zoo. We see the zoo keepers give them food to eat. . They just eat, walk and sleep all day. . But in fact most of them are sad. Why? .

Animals like monkeys and tigers usually live freely and happily in forests or mountains. Tigers, for example, run, jump, play with their children. . But now they have to stay in the small rooms in the zoo. Their life there is different from that in the forests.

. Do you think so?

A. Animals should go back to the forests.

B. So many of us think that the animals are happy.

C. They don't need to find food by themselves.

D. Because they are not free.

E. They catch small animals for food.

福建省晋江市安海片区 2015-2016学年八年级上学期期末测试