The problem of organic farming is_____.

• A、poor qualities of soils
  
  

• B、high production costs
  
  

• C、the use of too much land
  
  

• D、the shortage of farm workers
  
  

College teachers are often annoyed with students' high self- esteem

• A、True
  
  

• B、False
  
  

• C、Not Given
  
  

Task 1　　

16.Paragraph①_____.

17.Paragraph②_____.

18.Paragraph③_____.

19.Paragraph④_____.

20.Paragraph⑤_____

A.proteins and calcium

　　B.fat and sugar

　　C.cough and cold

　　D.your body look and feel young

　　E.drink milk and honey

　　F.of calcium