完形填空。（10分）通读下面短文，掌握其大意，然后从各题所给的四个选项中选出一个最佳答案。 Many people like to keep dogs as their pets. But do you know dogs were wild animals long, long ago The _1_ wild dogs were trained by _2_ in Europe about 10,000 years ago. These first “dogs” were not like _3_ we have now. They might have been small wolves. These dogs often came near human to _4_ food. Some of the young dogs were adopted (收养) by people. Human found the _5_ were a help to them in many ways. The dogs helped them to hunt. They could smell and hear danger _6_ people could. They helped people keep _7_ on cold nights. So it was _8_ to raise the dogs. Now, there are many different kinds of dogs _9_ they may look quite different from each other. Dog trainers think there are more than 400 different types in the world. The number keeps increasing with new kinds. Since those early days, human and dogs have always been together. We should _10_ them because they are really our friends.1. A. first B. lateC. last D. whole2. A. wolves B. catsC. humans D. students3. A. where B. whatC. when D. which4. A. steal B. wasteC. make D. serve5. A. rabbitsB. foxesC. wolvesD. dogs6. A. whenB. afterC. before D. as soon as7. A. cool B. warmC. hot D. cold8. A. hardB. uselessC. easilyD. useful9. A. so B. andC. from D. although10. A. hurtB. killC. protect D. see【答案】：15 ACBAD 610 CBDBC