阅读理解。 When a cat is frightened, its heart starts beating faster, its muscles (肌肉) get tense, and there are changes in the chemicals in its blood-stream. If the danger continues, it will defend itself, or it will run away as fast as possible. Something like this also happens to people. When we are excited, angry, scared or aroused by other emotions, our bodies go through many physical changes, all of which make us more alert (警觉的) and ready to react. We, too, get ready to defend ourselves or run. Human beings, however, have a problem that animals never face. If we give way to our feelings and let them take over, we can get into trouble. Have you ever said something in anger-or hit somebody-and regretted it later? Have you ever shouted at a teacher, told somebody you were lonely, or said you were in love, and then wished later you had kept your mouth shout? It isn't always wise to express your feelings freely. Does this mean that it's smarter always to hide our feelings? No! If you keep your feelings of anger, sadness, and bitterness hidden away or bottled up inside, your body stays tense. Physical illnesses can develop, and you can feel disturbed badly inside, it can actually be bad for your health. You can try to treat emotions as if they were bananas in the cupboard. You can hide them and you can pretend they don't exist, but they'll still be around. And at last you'll have to deal with them, just like those bananas. 1. By taking cat as an example, the author wants to show us that _______. A. animals can't control their feelings B. people can't control their feelings C. people physical reactions are like those of animals in a way D. people's bodies go through many physical changes in certain situations, too. 2. It's mentioned in the text that human beings get into trouble because ______. A. we are not as alert as animals B. we sometimes can't control our feelings C. we always do something wrong to other people D. we don't pay attention to our physical changes 3. The author wants to tell us in the last two paragraphs that ______. A. there's no way to deal with our feelings B. we should put some bananas in a cupboard when we're angry or scared C. feelings will gradually disappear when we hold them in D. we should neither express our feelings freely nor hide the bad feelings inside 4. The author's purpose in writing this article is to _______. A. tell us that it's pretty good to keep our feelings inside B. give some advice on how to express our feelings freely C. make us deal with our feelings in a wise way D. make us know it isn't always good to express our feelings freely