1.YES, charities are a good idea? because it can help the people who need help.
2. yes, i have been joined the walk ,run on a sponsored or charity
3.i went to join some event is about to help the old people ,also i call my friends to raise money
4,yes, Sir Ka-shing Li is the one famous charities in my country . He joined different charities events , Helping a lots of people .