Question 19 is based on the passage you have just heard.

Passage Two

    Agricultural workers in green tea fields near Mt. Kenya are gathering the tea leaves. It is beautiful to see. The rows of tea bushes are straight. All appears to be well. But the farmers who planted the bushes are worried. 

    Nelson Kibara is one of them. He has been growing tea in the Kerugoya area for 40 years. He says the prices this year have been so low that he has made almost no profit. He says he must grow different kinds of tea if he is to survive. 

    Mr. Kibara and hundreds of other farmers have been removing some of their tea bushes and planting a new kind of tea developed by the Tea Research Foundation of Kenya. Its leaves are purple and brown. When the tea is boiled, the drink has a purple color. 

    Medical researchers have studied the health benefits of the new tea. （19、20）They say it is healthier than green tea and could be sold for a price that is three to four times higher than the price of green tea. 

    But Mr. Kibara says he has not received a higher price for his purple tea crop. （21）He says the market for the tea is unstable and he is often forced to sell his purple tea for the same price as green tea leaves. He says there are not enough buyers willing to pay more for the purple tea.

 Why have tea farmers in Kenya decided to grow purple tea?

该题目为细节题。问题是：为什么在 Kenya 的茶农决定种植紫茶？ 出题点位置不明显，且有干扰性。原文“He says the prices this year have been so low that he has made almost no profit. He says he must grow different

kinds of tea if he is to survive”说明，Kenya 认为当年的价格太低了以至于没有利润，他得种植不同的品种来维持生计。选项 B 和 D 中均出现了原文再现词汇 price 和 survive。对比两组选项，B）It may be sold at a higher price（紫茶可能卖到更高的价格），D）It can better survive extreme weathers（紫茶能够在极端的环境生存），我们可以发现选项 D 的主语和原文的主语不同， 原文表达的是茶农才能够生存。同学们一定要关注细节，避开干扰的地方。因此，正确选项为 B。