Bicycle commuting could be more effective in reducing greenhouse gases.

• A、True
  
  

• B、False
  
  

• C、Not Given
  
  

Task 1

16. Paragraph①

17. Paragraph②

18. Paragraph③

19. Paragraph④

20. Paragraph⑤

A. Definition of volunteers

B. How volunteers are organized

C. How volunteers contribute to society

D. Why people want to be volunteers

E. An organization sending volunteers abroad

F. An organization delivering meals to the elderly

Task 2

21. People do voluntary work because they want to（   ）

22. Some volunteers help others by（   ）

23. Some organizations rely on volunteers to help（   ）

24. The elderly can have their meals delivered without（   ）

25. Many volunteers returning from poor countries（   ）

A. help others

B. leaving their homes

C. cooking for the elderly

D. using their professional skills

E.find their experience rewarding

F.preserve the natural environment