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ggs, for example, can still be eaten three to five weeks after purchase even though the useby date is much earlier.When their useby dates pass, strawberryflavored drinks may lose their red color and biscuits may lose their crunch(嘎吱嘎吱的聲音), but they are not harmful.“It’s a confusing subject, the difference between food quality and food safety,” said Jena Roberts, vice president of National Food Lab, a US food testing pany. “Even in the food industry I have colleagues who get confused.”This is why scientists are calling for a standard explanation to be printed following the useby dates. “We want this to be clearly municated so consumers are not misunderstanding the date and contributing to a lot of waste,” said Dana Ganders, a staff scientist with the NRDC.But this won’t be a mistake that is easy to correct since people have believed it for so long. Another problem is that the quality levels of different foods change differently — some are still safe to eat long after their useby date while others are not.As a result, food industry officials are now thinking of changing the useby date to a date indicating when food is most likely to go bad.4. The useby date was first intended to ________.A. tell the freshness of foodB. show the safety of foodC. give a warning of food poisoningD. indicate the relation between food and illness5. The underlined word “misinterpreted” in Paragraph 4 probably means “________”.A. made guesses aboutB. formed a wrong idea aboutC. made wrong use ofD. took no notice of6. Which of the following is TRUE?A. Most customers understand what useby dates mean.B. “Useby dates” have existed for more than 50 years.C. Biscuits can’t be eaten when not as crunchy as they were bought.D. Even after their useby dates pass, some foods are still safe to eat.7. Scientists are calling for a standard explanation to be printed together with the useby dates because________.A. useby dates are not helpful or reliableB. more consumers get worried about food safetyC. most consumers often misunderstand useby datesD. the quality level of different foods changes differently答案與解析【解題導(dǎo)語】本文是一篇說明文。大多數(shù)人都認(rèn)為保質(zhì)期一到