年国家开放大学电大英语II(2)阅读考试题 第三部分 完形填空 Genetic Engineering Many people are unaware that a lot of the foods they eat every day, such as bread ham and cheese, have been altered by using new technology. Food can be changed. It can be made to taste different or to look different carrots can be made to taste of chocolate and apples can be made redder. Some food that appears the same has been scientifically improved, for example, fish can be made t
