Task 2

21. In the twentieth century, soot          

22. If snow and ice covered areas begin melting,           

23. A soot forcing is unusually effective, which          

24. Hansen cautioned that greenhouse gases          

25. Warming in the Northern Hemisphere was large in at middle and high latitudes.           

A. produces much more global warming than a carbon-dioxide forcing of the same magnitude

B. contributed to 25 percent of observed global warming

C. winter and spring

D. the warming effects increase

E. still surpass soot in warming the world's climate during the last century

F. can be seen mostly in the Northern Hemisphere

Polar explorers can stay alive by wearing warm coats and furs.

• A、True
  
  

• B、False 
  
  

• C、Not Given
  
  

According to the passage, what is the main difference between ritual and drama?

• A、Ritual uses music whereas drama does not. 
  
  

• B、Ritual is shorter than drama. 
  
  

• C、Ritual requires fewer performers than drama. 
  
  

• D、Ritual has a religious purpose and drama does not.