单项选择题

According to the above article ______.

A．to be like a pig is to be "piggish"
B．immunization of pigs is commonplace
C．eating pork is unhealthy
D．pet owners would never think of eating their pigs

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单项选择题

Some anatomical features of a pig are similar to those of a human. Therefore ______.

A．pigs can live as long as people
B．pigs are becoming popular as movie and TV stars
C．medical research on pigs help humans
D．pigs and people naturally get fat

单项选择题

The author of this article maintains ______.

A．pigs are not very intelligent
B．the owners of pet pigs have their own society
C．pigs can never be popular
D．pigs live short lives because of their diet