[语篇解读] 香蕉由于遗传性的抗病弱点，在不久的将来有的品种可能会消失。文章列举了两种威胁Cavendish香蕉的真菌病，国际组织建议农民种植更多种类的香蕉。
1．What does this passage mainly tell us?
A. Bananas are the world’ s most important food crops.
B. The risk to a popular banana shows need to grow other kinds.
C. There are five hundred different kinds of bananas.
D. How to grow bananas in different countries.
