Task221. 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 othersB. leaving their homesC. cooking for the elderlyD. using their professional skillsE.find their experience rewardingF.preserve the natural environment
The mother and the son went out in the back yard to(