阅读下列短文，完成下列问题。

     Mr. Smith had two sons. One is seven years old, and the other is five. One morning during the holidays, when he was cleaning the car, his younger son came and asked him for some money for sweets.

     "Sweets are bad for your teeth, " Mr. Smith said. "Take these two oranges instead, and give one to your elder(年长的) brother. " One of the oranges is quite a lot bigger than the other one, and as the small boy liked oranges very much, he kept that bigger one for himself, and gave his brother the smaller one.

      When the other boy saw that his brother had a much larger orange than his own, he said to him, "It’s selfish(自私的)to take the bigger one for yourself, ff father had given the oranges, I’d have given you the bigger one. "

     "I know you would, " answered his brother. " That's why I took it.

1. What was Mr. Smith doing one morning?

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2. What did his younger son ask for?

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3. Did the son get what he wanted?

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4. Who got the bigger orange?

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5. Why did the elder brother say that his brother was selfish?

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