C．A virus picked up from the Internet is likely to damage a computer.

　　D．The more often you use a computer, the more smoothly it works.

　　Ⅲ.阅读简答

　　A student was one day taking a walk with a professor. As they went along, they saw lying in the path a pair of old shoes, which they supposed to belong to a poor man working in a field nearby.

　　The student turned to the professor, saying: “Let us play the man a trick: we’ll hide his shoes, and place ourselves behind those bushes, and wait to see his perplexity(困惑) when he cannot find them.”

　　“My young friend，” answered the professor, “we should never amuse ourselves at the expense of the poor. But you’re rich, and may give yourself a much greater pleasure by means of the poor man. Put a coin into each shoe, and then we’ll hide ourselves and watch how the discovery affects him.”

　　The student did so, and they both hid somewhere nearby. The poor man soon finished his work, and came across the field to the path where he’d left his coat and shoes. While putting on his coat, he put his foot into one of his shoes; but feeling something hard, he bent down to see what it was, and found the coin. Astonishment and wonder were seen upon his face. He picked up the coin, turned it round, and looked at it again and again. He then looked around but saw nobody. He now put the money into his pocket, and went on to put on the other shoe; but his surprise was doubled on finding the other coin. He was so touched that he fell upon his knees, and let out a loud thanksgiving, in which he spoke of his sick wife and his hungry children and the importance of the money to them.

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