13.It was dark outside the car window that it was hard to see anything.
"Can I have a carrot,Mum?"Riley asked.
"I don't have any carrots,"her mum said."If I eat one now,it might help me see in the dark."
Would eating a carrot really help Riley?What is special about carrots?A clue to what makes a carrot special is its color.Carrots are orange because they store beta-carotene(β胡蘿素).Beta-carotene is a way to talk about vitamin A (維生素A).Your eyes need vitamin A.It helps them work.
When light hits your eyes,very small parts inside turn the light into messages.The messages go to your brain(腦),and then you know what you're looking at.Your eyes can only turn light into messages when it has a special chemical(化學物質(zhì)),that's where vitamin A comes in.Your eyes use vitamin A to make the special chemical.Every time your eyes change light into messages,a little bit of the chemical is used up.By the end of the day,you're 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 store some beta-carotene,or vitamin A.Sweet potatoes,red peppers,mangoes(芒果) are a few that have the same orange secret.Can you think of any more?
61.Riley wanted a carrot because she thoughtC.
A she liked it
B.she was thirsty
C.it could help her see in the dark
D.it was sweet and delicious
62.The underlined word"clue"here in Chinese means"D".
A.告知
B.線路
C.方法
D.線索
63.How can Vitamin A help your eyes work?D
A The special chemical can stop your eyes from using up Vitamin A
B.Vitamin A can stop your eyes from using up the special chemical.
C.The special chemical is used to make Vitamin A the light is turned into messages with.
D.Vitamin A is used to make the special chemical the light is urned into messages with.
64.Which one is NOT true according to the passage?B
A.Carrots are orange because they store beta-carotene or vitamin A.
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.
D.Sweet potatoes,red peppers,and mangoes have the same orange secret.
65.The passage mainly tell us thatC.
A.we can't see clearly in the dark unless we eat any carrots every ay
B.we can't see clearly unless we eat any orange or red food everyday
C.we should eat some food with Vitamin A so that we can see clearly
D.we should eat some fruit with beta-carotene so that we can see in the dark.
分析 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(chǎn)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.
解答 61.C.細節(jié)理解題.根據(jù)第二段If I eat one now,it might help me see in the dark如果我現(xiàn)在吃一個胡蘿卜,它可能會幫助我在黑暗中看到;可知想要胡蘿卜是因為她認為它可能會幫助她在黑暗中看到;故選C.
62.D.詞義猜測題.根據(jù)第四段A clue to what makes a carrot special is its color.Carrots are orange because they store beta-carotene可知胡蘿卜的一個特殊的線索是它的顏色.胡蘿卜是橙色的因為他們的β-胡蘿卜素;可知意為線索;故選D.
63.D.細節(jié)理解題.根據(jù)第五段Your eyes use vitamin A to make the special chemical.Every time your eyes change light into messages,a little bit of the chemical is used up可知維生素A是用來制造特殊的化學物質(zhì)去改變進入眼睛的光的信息;故選D.
64.B.細節(jié)理解題,根據(jù)最后一段Most orange or red fruits store some beta-carotene,or vitamin A.Sweet potatoes,red peppers,mangoes(芒果) are a few that have the same orange secret.可知大多數(shù)橙色或者紅色的食物中都含有維生素A,但不是全部的橙色或紅色食物,故選B.
65.C.主旨大意題,根據(jù)第四段Your eyes need vitamin A.It helps them work可知作者通過這篇文章主要告訴我們應(yīng)該吃一些含維生素A的食物以便我們能看得清楚,故選C.
點評 考察學生的細節(jié)理解和推理判斷能力,做細節(jié)理解題時一定要找到文章中的原句,和題干進行比較,再做出正確的選擇.在做推理判斷題不要以個人的主觀想象代替文章的事實,要根據(jù)文章事實進行合乎邏輯的推理判斷.