快速准确地找出每一段的主题句，对于文章整体内容的把握起着十分重要的作用；而借助于语法知识搞清句子结构，则对于准确理解阅读中的长、难句有至关重要的作用。阅读下列短文，然后按要求做题。

　　Laziness is regarded as wrong or shameful, as everyone knows．We have probably had lectures pointing out that laziness is not good, not following accepted principles, that it is wasteful, and that lazy people will never amount to anything in life．But laziness can be more harmful than that, which is often caused by complex reasons than simple wish to avoid work．Some people who appears to be lazy are suffering from much more serious problems．They may be so distrustful of their fellow workers that they are unable to join in any group task for fear of being laughed at or fear of having their ideas stolen．These people who seem lazy may be paralyzed by a fear of failure that prevents fruitful work．Or other sorts of fantasies may prevent work; some people are so busy planning, sometimes planning great deals or fantastic achievements that they are unable to deal with whatever“less”work is on hand．Still other people are not avoiding work; strictly speaking, they are merely delaying doing things．

　　In spite of that, laziness can actually be helpful．Some people may look lazy when they are really thinking, planning, contemplating(沉思)or researching．We should all remember that some great scientific discoveries occurred by chance or while someone was goofing off．Newton wasn't working in the orchard when the apple hit him and he discovered the theory of gravity．All of us would like to have someone“lazy”build the car or stove we buy, particularly if that“laziness”were caused by the worker's taking time to“lazy”－that is, taking time off for a rest is good for the overworked student．Taking a rest can be particularly helpful to the athlete who is trying too hard or the doctor who is simply working himself overtime too many evenings at the clinic．So be careful when you see someone lazy．That person may be thinking, or planning his or her next book．

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