Question

1 

It was so dark outside the car window that it was hard to see anything.

“ Can I have a carrot, Mom?” Bruce asked.

“I don’t have any carrots,” his mom said. “How about an apple?”

“No,” said Bruce. “It has to be a carrot.”

“Why do you want a carrot?” asked his mom

“You always say carrots help your eyes.” said Bruce. “If I eat one now, it might help me see in the dark.”

Would eating a carrot really help Bruce? What is special about carrots? What makes a carrot special is its color. Carrots are orange because they contain(包含) bta-carotene( 胡萝卜素). Beta-carotene is a way of saying vitamin A. Your eyes need vitamin A. It helps them work.

When light hits your eye, very small parts inside turn the light into messages. The messages go to your brain（大脑）, and then you know what you’re looking at. Your eye can only turn light into messages when it has a special chemical(化学物质). Your eyes use vitamin A to make the special chemical. Every time your eye changes light into messages, a little bit of the chemical is used up. By the end of the day, you’ve looked at hundreds of things. That uses up a lot of the chemical. Your eyes need to make more.

What should you eat if you don’t like carrots? Don’t worry. Other fruits and vegetables have vitamin A, too. The secret is in their color. Most orange or red fruits and vegetables contain beta-carotene, or vitamin A, Sweet vegetable, red peppers（胡椒）, Mangoes(芒果) are a few foods that have the same orange secret.

1. Bruce wanted a carrot because he thought _______.

A. he liked it

B. it could help him see in the dark

C.  it was sweet and delicious

2.How does vitamin A help your eyes work?

A. The special chemical can stop your eyes from using up vitamin A.

B. The special chemical is used to make Vitamin A which turns the light into messages

C. Vitamin A is used to make the special chemical which turns light into messages.

3. Which of the following is NOT true according to the passage?

A. Carrots are orange because they store beta-carotene.

B. Any food which is orange or red must have some Vitamin A.

C. Most fruits that are orange or red store some beta-carotene or Vitamin A.

4. Sweet vegetable, red peppers, and mangoes don’t have the same orange secret, do they?

A. No, they don’t.      B. Yes, they do.     C. I’m not sure.

5. The passage mainly tells us that _______.

A. we can’t see in the dark unless we eat many carrots every day

B. we can’t see unless we eat a lot of orange or red food every day

C. we should eat some food containing vitamin A so that we can see well

 

Answer 1

【答案】

 

1.B

2.C

3.B

4.B

5.C

【解析】

试题分析:

1.根据“You always say carrots help your eyes.” said Bruce. “If I eat one now, it might help me see in the dark.”可知选B。

2.根据When light hits your eye, very small parts inside turn the light into messages. The messages go to your brain（大脑）, and then you know what you’re looking at. Your eye can only turn light into messages when it has a special chemical(化学物质). Your eyes use vitamin A to make the special chemical. Every time your eye changes light into messages, a little bit of the chemical is used up.描述可知选C.

3.根据Most orange or red fruits and vegetables contain beta-carotene, or vitamin A,most不等于any,故选项B与短文不符.

4.根据 Sweet vegetable, red peppers（胡椒）, Mangoes(芒果) are a few foods that have the same orange secret.可知答案为肯定.英语反义疑问句的回答只依据事实来回答,故选B.

5.这篇短文主要描述了维生素A对我们的视力有好处,故选C.

考点：科普性短文的阅读

点评：本文由一个小故事引出了对维生素A的介绍,作者重点描述了维生素A是如何对我们的眼睛产生作用的.短文最好告诉我们要多吃富含维生素食品,并介绍了一些富含维生素的食品.