
Do you like dogs? As the saying goes, “Dogs ____1____ man’s best friends.” And this animal has been good friends ____2____ human beings for thousands of years. In China today, ____3____ people keep dogs as their pets in the city. In the countryside, people keep dogs ____4____ doors of their houses. The army or police also keep dogs, but for different working purposes.
Crime (犯罪活动) sometimes takes place in the society. Police dogs have an important role in fighting crime. Each dog ____5____ with one police officer. Together, the dog and the officer go through a ____6____ program of difficult training. From the training, the dog can learn many skills. ____7____ will help it a lot in its future tasks. After the dog ____8____, it will use its super-powerful nose to help the officer look for criminals, search for stolen things and sniff (嗅) out something dangerous and illegal. A police dog and its human partner always work ____9____ as a team. They stay together almost all the time.
This explains ____10____ good helpers to people.
The word “illegal” means not allowed by the law.