16．A） Bus No.89goes to Shanghai Zoo directly． B） Bus No.806can take the boy to Shanghai Zoo． C） It is fun to change the bus on the way to the Zoo． D） It is not far from the bus stop to Shanghai Zoo．
6．The widespread number of food scandals （ 丑聞） in China is making many people pause before they put their chopsticks in their mouth．They are wondering if the food they are eating is clean，healthy and nutritious or does it contain something harmful that will cause disease？ Most of the food we eat today is processed food（ 加工食品）．That means the foods we buy in stores and supermarkets，especially packaged foods，are prepared in factories． Chemicals are added to the foods in these factories to make them look better，taste better and last longer on the shelf．The chemicals are supposed to be harmless and there are laws that regulate which chemicals can and cannot be used．Unfortunately，some producers do not obey the laws． A producer of steamed buns （饅頭） in Zhejiang Province was recently discovered to be breaking the law．He was adding yellow dye and other banned chemicals to the buns．He was also taking old buns and using them to make new buns．Most of the buns were sold to schools and eaten by students…like you'Why did he do it？Why did he break the law and endanger people's health？The answer is simple：he wanted to make more money．It was a moral failing，and this is at the heart of the food scandals in China．Too many people focus on making money and not on the effects their actions can have on others．
48．Chemicals are added to the foods in the factories becauseA． A．they want to make the foods look better，taste better and last longer B．they want to make the foods contain something harmful C．chemicals will cause disease D．chemicals are harmless 49．According to the passage，which is NOT true？D． A．Most of the food we eat today is prepared in factories． B．There are laws that regulate which chemicals can and cannot be used． C．The food scandals in China are making many people worry about the food safety． D．Most of the buns were sold to schools and eaten，by students in Zhejiang Province． 50．It was a moral failing，and this is at the heart of the food scandals in China．Here what's the Chinese meaning of"moral failing"？B． A．精神崩潰 B．道德滑坡 C．質量下降 D．心理失衡 51．What is the main reason of the food scandals in China？C． A．Some producers do not obey the laws． B．The processed food is clean，healthy and nutritious． C．Too many people pay much attention to making money． D．The chemicals are supposed to be harmless and can be used．
