[单项选择]

Passage Two The lion may be the most famous of all the predators of Africa, but one of the most fascinating is the wild dog. Wild dogs are fairly small, averaging seventy pounds, with round, fanlike ears that look too big for their heads. They have shaggy brown coats with scattered patches of white. One of these animals by itself looks harmless or even comical. But when they band together, in packs of up to forty, the wild dogs become dangerous predators that tirelessly run down and kill animals that are many times their own size. Wild dogs have to be good hunters in order to feed their large families; a single female can have as many as sixteen pups at a time. But usually only one female in a pack breeds at a time, and all the pack members help to care for the young. At first, the pups feed on their mother’s milk. Then the other dogs begin to bring back meat from the kill, carrying it in their stomachs and throwing it up when the pups come running to them to beg for
A. are very fierce
B. hunt in large packs
C. are very intelligent
D. have unusually large litters

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