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精英家教網 > 初中英語 > 題目詳情

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( 胡蘿卜素). 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(大腦), and then you know what you’re looking at. Your eye can only turn light into messages when it has a special chemical(化學物質). 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.
小題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
小題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.
小題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.
小題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.
小題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

小題1:B
小題2:C
小題3:B
小題4:B
小題5:C

試題分析:
小題1:根據“You always say carrots help your eyes.” said Bruce. “If I eat one now, it might help me see in the dark.”可知選B。
小題2:根據When light hits your eye, very small parts inside turn the light into messages. The messages go to your brain(大腦), and then you know what you’re looking at. Your eye can only turn light into messages when it has a special chemical(化學物質). 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.描述可知選C.
小題3:根據Most orange or red fruits and vegetables contain beta-carotene, or vitamin A,most不等于any,故選項B與短文不符.
小題4:根據 Sweet vegetable, red peppers(胡椒), Mangoes(芒果) are a few foods that have the same orange secret.可知答案為肯定.英語反義疑問句的回答只依據事實來回答,故選B.
小題5:這篇短文主要描述了維生素A對我們的視力有好處,故選C.
點評:本文由一個小故事引出了對維生素A的介紹,作者重點描述了維生素A是如何對我們的眼睛產生作用的.短文最好告訴我們要多吃富含維生素食品,并介紹了一些富含維生素的食品.
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