题目内容：

    Many people have the wrong ideas about pigs．Pigs are actually（买际上） very clean animals．On farms，they live in dirty places，so they become very dirty．But in the wild，pigs keep themselves very clean．

They are also very smart．They may he smarter than clogs．So pigs can learn things from people．

Pigs are very friendly animals．Some people raise （饲养） them as pets．Of course，people raise the smart kind，not the big kind．Small pigs are very cute．And they don't break things in the house．Big pigs usually live outside on the farms，not in people's houses．

1.Which words can describe（描述） pigs？

A. Nervous and strange， B. Dirty and stupid．

C. Dangerous and friendly． D. Smart and friendly．

2.What do the underlined words" in the wild" mean？

A. In nature． B. On the farms．

C. Acting crazily． D. In people's homes．

3.Which of the following is TRUE？

A. Pigs like to be dirty． B. People can teach pigs things．

C. Dogs are smarter than pigs． D. Only farmers raise pigs．

4.What kind of pigs do people raise in their homes？

A. The very big kind． B. The small kind．

C. The kind from farms． D. The ugly kind．

5.The article（文章） does not discuss（讨论）

A. pigs and pets B. pigs on farms and in the wild

C. raising dogs D. people's wrong ideas about pig．