[文章大意]'本文为说明文，题材为社会文化，主要介绍了bug这一单词词义的发展过程。

　　5．D。细节理解题。根据第一段可知在18世纪前美国人和英国人都使用bug这一单词，故选D项。

　　6．D。词义猜测题。根据下文“In 1878 he explained bugs...to overcome in developing a successful product”可推断flaw的意思可能是“缺陷，毛病，问题”，故选D。explanation解释；finding调查发现；origin起源，由来。

　　7．B。推理判断题。通读全文可知。

　　Ⅴ. 短文改错

　　Dear Li Lei，

　　I am writing to provide my sincere congratulations on your graduation from senior high school and enrollment by the Peking University. I know you worked very hard in the past years, so I am truly happy to see that all your effort get rewards. I am sure your parents are great proud of you.I just want you to know how pleasing I am to witness your success. Being admitted by Peking University is a new start for you, who will bring you a good chance to learn of top professors. However, it's good for you to study with such many excellent students who of course will give you motivations to study hard. I wish you a greater success in university and live a happy and fruitful life in the next four years.

　　Sincerely Yours，

　　Han Meimei

　　答案：

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