E As more people move into apartments, there are limitations on keeping of animals like dogs and monkeys. Therefore, caged animals have increased in popularity. Birds fall into this group. We keep them for their beautiful songs and feathers. Fish-keeping is a widespread hobby and the keeper can observe their behaviour in the glass tank and study its entire life cycle. The cat is a fine house pet and it fits neatly into human habitation(居住地) without requiring its own cage. They are wonderful hunters, if there are rats around.
A.Pet-keeping has a very long history.
B.Pet-keeping may do harm to animals.
C.People keep pets for their aesthetic need.
D.Caged pets become increasingly popular.
E.Pet-keeping is helpful for children’s growth. B Pet-keeping is a time-honoured tradition. One of the reasons for people to raise dogs or cows was usefulness. While people in the past hunted animals and kept them in their backyards, the civilsed man today is less cruel towards them and is less exploitative(利用的).