Dogs are friends of man. They work for us. They hunt with us. They also play with us. But

Dogs are friends of man. They work for us. They hunt with us. They also play with us. But a long time ago, all over the world, dogs were wild. Dogs can go back to the Stone Age. All dogs had the same ancestor (祖先). It is believed that this ancestor was much like a wolf. Other animals, like fox, also came from this ancestor. Thousands of years ago, man began to tame (使驯服) the wild dogs. When the dogs were tamed, they were trained well. The strong dogs then became working animals. They were trained to pull heavy loads (担子). They learned to keep watching over sheep and other animals. Working dogs could do other things, too. Some dogs were not strong. But they could help man hunt. Other dogs were best at pets. At first, there were only a few kinds of dogs. Today, there are more than 100 kinds.
【小题1】The word “wild” in the first paragraph means .A．温顺的B．野生的C．凶残的D．善良的【小题2】Dogs can go back to the Stone Age. Here “go back” means .A．追溯到B．回来C．违背D．返回去【小题3】From this passage, we know that .A．all the animals have the same ancestorB．all dogs are as wild as they were many years agoC．man has helped change dogsD．animals never change【小题4】What jobs can dogs do?A．Keep watching over sheep.B．Hunt with man.C．Pull heavy loads.D．All the above.【小题5】The main idea of the whole story is that .A．man and dogs have the same ancestorB．all animals are too wild to be man’s friendsC．dogs and man have been friends for a long timeD．people like to keep foxes as pets because they are tamerC

(答案→)C 解析：【小题1】根据单词的意思，和具体语境，故选C【小题2】根据文章内容Dogs can go back to the Stone Age.中的描述，可知答案为A【小题3】根据文章内容可知答案为C【小题4】根据文章内容大意可知答案为D【小题5】根据文章内容大意可知答案为C

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