《2025年辽宁作业分层培优学案八年级英语上册人教版》

一、阅读理解
Whether yellow, red or white, the onion is a vegetable that you may not know well. People have used onions to add flavor (味道) to their food for thousands of years. Besides onions' great taste, onions are very good for you. They have special chemicals (化学物质) that improve your ability to fight off illness and you have fewer chances of getting ill.

Although onions are good for you, it is difficult to cut an onion. When you cut into an onion, irritating (刺激性的) chemicals inside the onion will get into the air. They touch your whole eyes and cause pain. Your eyes make tears to wash away the chemicals and protect your eyes.
Luckily, cooks and scientists have discovered some ways to keep you from crying when you cut up onions.
- Cut the onion under running water. The water will wash away the chemicals before they can reach your eyes.
- Use a fan to blow air over the onion as you cut it. The air will blow the chemicals away from your eyes.
- Put the onion in a fridge for an hour before cutting it. This helps make the chemicals in the onion move slowly, so they may not ever reach your eyes.
If you try out these good ways and still cry while cutting onions, don't worry. Scientists think if you cut more onions, your body will become more resilient (坚韧的) to the onions' chemicals. So the tears will not last long. If you think about how healthy onions are, you might even call those tears "happy tears".
(C) 1. The underlined word "They" in Paragraph 2 refers to "______".
A. eyes
B. onions
C. irritating chemicals
D. onions' great tastes
(B) 2. What can you do to stop crying when you cut up onions?
① Cut the onion under running water.
② Use a fan to blow air over the onion while cutting.
③ Cover the onion with a piece of cloth as you cut it.
④ Put the onion in a fridge for an hour before cutting it.
A. ①②③
B. ①②④
C. ①③④
D. ②③④
(C) 3. Which of the following is NOT true according to the text?
A. People use onions to add flavor to their food.
B. You can put the onion in a fridge for an hour before cutting it.
C. The special chemicals in onions are able to make you get a disease.
D. If you cut more onions, your body will become more resilient to the onions' chemicals.
(A) 4. In which part of a magazine can you probably read the text?
A. Life and health.
B. Language and culture.
C. Business world.
D. National news.

答案： 1.C 2.B 3.C 4.A