Task 1
　　You heard that there's a group of people doing unpaid work helping old people in the local community.
　　Write a letter addressing
　　1. how you heard about the group
　　2. the importance of their work
　　3. give details of what you can do to help
　　Task 2
　　In many countries, the cost of air flight is dropping down. Do you think it is a positive development or a negative development?