阅读理解

阅读下面文章，根据文章内容，从每小题所给的A、B、C、D四个选项中选出能回答所提问题或完成所给句子的最佳答案。

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

　　“Can I have a carrot, Mum?” Riley asked．

　　“I don't have any carrots,” her mum said．“How about an apple?”

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

　　“Why do you want a carrot?” asked her mum．

　　“You always say carrots help your eyes,” said Riley．“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(胡萝卜素)．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 eye, 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 eye 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 eye changes light to 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 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?

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阅读理解

阅读下面文章，根据文章内容，从每小题所给的A、B、C、D四个选项中选出能回答所提问题或完成所给句子的最佳答案。

　　A well-known speaker started off his speech by holding up a ＄20 bill(钞票)．In the room of 200,he asked,” Who would you like this ＄20 bill?”

　　Hands started going up．He said, “I am going to give this ＄20 to one of you ,but first, let me do this．”

　　He continued to crumple(弄皱)the 20-dollar note up．He then asked, “Who still wants it?” Still the hands were on in the air．

　　“Well,” he replied, “what if I do this?,” He dropped it on the ground and started to grind(磨)it into the floor with his shoe．He picked it up, now the note was crumpled and dirty．

　　“Now, who still wants it?”

　　Still the hands went into the air．

　　“My friends, you have all learned a very valuable lesson．No matter what I did to the money ，you still wanted it because it did not decrease　in value(价值)．It was still worth ＄20．”

　　“Many times in our lives, we are dropped, crumpled ,and grounded into the dirt by the decisions we make and the circumstances(情况)that come our way．We feel as though we are worthless; but no matter what happened or what will happen, you will never lose your value．”

　　“Dirty or clean, crumpled or finely creased ,you are still priceless(无价的)to those who love you．The worth of our lives comes, not in what we do or who we know, but by WHO WE ARE．”

　　“You are special——don't ever forget it．”

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