Question

16．The world's most popular banana is facing a major health crisis．According to a new study，a disease caused by a powerful fungus（真菌）is killing the Cavendish banana，which accounts for 99% of the banana market around the globe．The disease，called Tropical Race 4 （TR4），has affected banana crops in southeast Asia for decades．In recent years，it has spread to the Middle East and the African nation of Mozambique．Now experts fear the disease will show up in Latin America，where the majority of the world's bananas are grown．
  Once a banana plant is infected with TR4，it cannot get water and nutrients．TR4 lives in soil，and can easily end up on a person's boots．If the contaminated boots are then worn on a field where Cavendish bananas are grown，the disease could be transferred．"Once a field has been contaminated with the disease，you can't grow Cavendish bananas there anymore，"Ploetz says．
  Cavendish bananas are popular among consumers．Ploetz says，"Consumers like the way Cavendish looks and tastes．"
  But Cavendish is also particularly attacked by TR4．"And they are all easily infected with this disease．So once one plant gets infected，it just runs like wildfire throughout that entire plantation．"
  Bananas have faced this kind of crisis before．In the mid-1900s，the most popular banana at the time was nearly wiped out by an earlier version of TR4．
  One solution to the problem，Ploetz says，is to try to develop new bananas that can resist TR4．"It really needs to be done，but we don't have it yet．"He notes that we still have time before we need to worry about the Cavendish banana disappearing．
27．The underlined word"contaminated"in Paragraph 2 can be replaced by"D"．
A．replaced    
B．supplied    
C．prevented  
D．infected    
28．If a banana plant is infected with TR4，the banana plant will probably die ofA．
A．thirst       
B．cold       
C．heat       
D．poison
29．We can infer that the disease，called TR4 canA．
A．last for a long time in the soil            
B．be cured easily with chemicals
C．be prevented from spreading easily        
D．damage a person's boots
30．which of the following is the best title？D
A．Hello，Bananas!
B．Say No to Bananas!
C．Bananas or TR4？
D．Bye-Bye，Bananas？

Answer 1

分析 本文是一篇科教类阅读，主要讲了一种名为TR4的疾病有可能会导致一种名为Cavendish 香蕉的消失．

解答 27-30．DAAD
27题答案：D考查细节推理，根据文章第二段的the disease could be transferred．Once a field has been contaminated with the disease…"这种疾病会传染，一旦一个地区_____了这种疾病"．可知划线单词的含义为"感染"，故本题答案为D选项．
28题答案：A考查细节推理，根据文章第二段的Once a banana plant is infected with TR4，it cannot get water and nutrients．一旦香蕉感染了TR4，它就无法获得水分和营养．故本题答案为A选项．
29题答案：A考查细节推理，根据文章第二段的Once a field has been contaminated with the disease，you can't grow Cavendish bananas there anymore．一旦一个地区感染了这种疾病（TR4），你就再也不能在那儿种植Cavendish香蕉了．可知TR4在土壤中持续的时间很长，故本题答案为A选项．
30题答案：D考查主旨大意，文章主要讲的是由于受到一种名为TR4疾病的影响，Cavendish香蕉正在逐渐减少甚至有可能会消失．故本题答案为D选项．

点评 本文是一篇科教类阅读，题目涉及多道细节理解题，做题时结合原文和题目有针对 性找出相关语句进行仔细分析，结合选项选出正确答案．推理判断也是要在抓住关键句子的基础上合理的分析才能得出正确的答案．