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Even though the verbs “should” (l.6) and “must” (l.8) have different meanings, they can be used interchangeably in the text without invalidating the author’s plea.

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The risks to safety and health mentioned in “reducing risks posed to society” (l.1-2) are caused by the work of engineers in their “procedures and design decisions” (l.10-11).

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The text claims that engineers are as much responsible for the reduction of risks in modern society as any other professional, because they “cannot bear the total blame” (l.3).

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A controlled experiment indicated that the idea presented by two chinese researchers might be able to reduce the waiting time of cars on red lights.

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Even though Guangzhou is the largest city in southern China, its bad traffic is nothing but a legend.

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It is common knowledge that traffic lights nowadays do not work very well when traffic is heavy.

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News and opinion programs can vary from one episode to the next, regardless of how traditionally structured they may be.

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There has been a noticeable hybridization of different kinds of television programming lately.

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IBM scientists and data entrepreneurs believe that gathering and mining massive amounts of data will lead to a better comprehension of social life.

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All the libraries in the United States combined would encompass as much as fifteen petabytes of new data a day.