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

After seeing the spit milk, his mother（   ）

• A、shouted at him
  
  

• B、cleaned the floor herself
  
  

• C、encouraged him to play in the milk
  
  

• D、forced him to clean the kitchen