As we should know, animals are not necessarily ________ lower form of life than ________ man.

A. a; theB. the; theC. a; /D. /; /

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Regularly staying late at the office significantly increases the risk of having a stroke or heart attack, researchers have found, working just an hour extra each day pushes up stroke risk by 10 per cent, according to a huge review of working patterns. And people who work an extra three hours a day--or 55 hours a week--are 33 per cent more likely to have a stroke, the scientists found.

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