Task 1

16. Paragraph     ①     

17. Paragraph     ②     

18. Paragraph     ③     

19. Paragraph     ④     

20. Paragraph     ⑤     

A. Lightening Causes Puzzles to People

B. Types of Lightning

C. Causes of Lightning

D. Differences Between Thunder and Thunderstorm

E. Frequencies of Thunderstorms Occurring in the World and the U. S.

F. Shock Waves as Thunder

The passage is mainly concerned with the

• A、types and function of sleep
  
  

• B、psychological role of dreams
  
  

• C、 history of reptilian sleep patterns
  
  

• D、influence of evolution on young animals
  
  

Men like George Strong are important to the future of the company.

• A、True
  
  

• B、False
  
  

• C、Not Given