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 clueto what makes a carrot special is its color．Carrots are orange because they store beta﹣carotene（β胡萝素）．Beta﹣carotene is a way to talk about vitamin A （维生素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（脑），and then you know what you're looking at．Your eyes can only turn light into messages when it has a special chemical（化学物质），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 thought 　　．

A．	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" 　　"．

A．	告知
B．	线路
C．	方法
D．	线索

63．How can Vitamin A help your eyes work？ 　　

A．	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？ 　　

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 that 　　．

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．

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