1 . Yes , they have ( Dẫn chứng : Americans have a tradition of volunteering and helping others since the earliest days of our nation's founding. )
2 . About a fifth of the US population ( Dẫn chứng :About a fifth of the US population works as a volunteer every year )
3 . Traditional volunteer activities include donating money to people in need, cooking and distributing food, doing manual labor (such as cleaning or repairing projects), providing mobile services. transfer (such as transporting the elderly), tutoring or guiding young people. ( Dẫn chứng : Traditional volunteer activities include donating money to people in need, cooking and distributing food, doing manual labor (such as cleaning or repairing projects), providing mobile services. transfer (such as transporting the elderly), tutoring or guiding young people. )