1. 根据短文内容，完成任务。

    Now many people like to keep dogs as their pets. But how did dogs become humans' close friends?

    In some places of Europe (欧洲), about 10,000 years ago, some wild (野生的) dogs often came to human's houses to find food. The wild dogs looked different from the ones today. They looked like wolves (狼). At first, they felt ① frightened. They always stood and looked for a short time. Then they got the food and ran away. Sometimes the young dogs couldn't run fast and people caught them. People trained them and the young dogs grew up with the help of people. Slowly, the wild dogs became home dogs. They could make home safe when people were away. They helped people hunt (狩猎). They helped people keep warm on cold nights. ② Sometimes, they could smell and hear danger before people could. In some cold places, they helped people pull (拉) things people need.

    Now there are more than 400 different kinds of dogs in the world. And they look different from each other. The number and kind are growing all the time. Today, some people mainly (主要地) regard dogs as pets. In fact, dogs are really our close friends. We should protect them from being killed.

1. （1） People began to train dogs with young wild dogs.

3. （2） Dogs are mainly used for hunting today.

5. （3） 文中①处画线单词的中文意思是：

   A . 兴奋的 B . 害怕的 C . 强壮的 D . 有趣的
7. （4） 将②画线句子翻译成中文。

9. （5） 回答问题。

   What could dogs do for humans long long ago?(不少于2条)