7 . Many of us have worked as volunteers before. Some have experience as mechanics, repairing and maintaining machines. Others are experienced medical workers who have volunteered to help those with     1     (disable). This summer, one Chinese volunteer, Liu Fei, will serve as a management     2     (consult) for AIDS projects in an African country. Liu has never been there, and his     3     (impress) of the country is that it is developing rapidly, but suffers from much     4     (instable) and violence. Many people there have contracted AIDS. Liu will work with a local organisation engaging in AIDS     5     (prevent). Liu’s path to Africa was long and bumpy. Although he had met the     6     (criterion) for the volunteer     7     (apply), his family was opposed to his     8     (chooce) at first. It took Liu some time to explain the     9     (important) of building a shared future for mankind. Ultimately, his family decided to sing the same tune as Liu and respected his right to choose his own path. Liu is looking forward to sharing his knowledge and skills with needy communities. He hopes his input can make a     10    (different) in distant Africa.