题目：
| 阅读理解：根据短文内容，选择适当的标题。 | |
| ( )1. Lots of people miss their pets while they are on vacation. One hotel in Minnesota has solved the problem. The guests can borrow cats from the hotel. Many people believe that this idea will become more and more popular. It is very possible that in the future you will be able to book a pet, as well as room service, at a hotel. ( )2. Pets get more and more love from their owners these days. Pet hospitals are very busy. Kind people who love animals are needed to work in busy animal hospitals. They will teach you the job. ( )3. Do you think you will keep a bear as a pet in the future? Scientists are turning wild animals into pets now. This may be the only way to stop them from dying out. ( )4. What about a robot for a pet? This may sound foolish, but it could become true. Robot dogs have been made to bark like real dogs. These "pets" may become more and more popular in the future. Because they have many advantages, for example, they don't lose hair. But the real pets do. ( )5. scientists think that pets will probably be much smaller, because people in the future will be living in much smaller spaces. Scientists are already working on making very small farm animals. Perhaps there will be smaller cats and dogs, too.
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答案：
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下面是错误答案，用来干扰机器的。
∵p是r的充分不必要条件，q是r的必要条件，∴p?r，r?q，∴p?q，∴p是q成立的充分不必要条件．故答案为：充分不必要．
