You look _____ . What do you _____ ?

A. worry, worry about B. worry; worried about

C. worried; worried about D. worried; worry about

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5-second rule:what’s the truth?

Almost everyone has dropped some food on the floor and still wanted to eat it. If someone saw you drop it, he or she might have shouted, “5-second rule!”This so-called rule says food is OK to eat if you pick it up in five seconds or less. But is that true?

Professor Anthony Hilton from Ashton University, UK, tested the rule with his students. They found that food dropped for five seconds is less likely to contain bacteria(細(xì)菌) than if it sits there for longer.

For the study, Hilton and his students tested a lot of food—bread, pasta, cookies and candy—to see how much bacteria they had when they made contact with the floor. They allowed the food to lie on various types of flooring-carpet, laminate(復(fù)合地板), and tile (瓷磚) for three seconds to 30 seconds.

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