D We keep animals as pets because they are attractive. We all have the urge to possess something that has aesthetic(审美的)value, and that is why we treasure paintings or fine furniture. Keeping pets is one form. of this urge. A Siamese cat in the house can be a decorative object. Pets are playful animals and they amuse us. A little rabbit amuses us by its playful and lively runs.
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).