Doing some form of voluntary work

Doing some form of voluntary work has (1)
British people. Over 20 million people were engaged (2)
been more popular with
voluntary
activities in 2013. Volunteering means giving up time to do work of (3)
to the community. It can be based in the UK or overseas. Volunteering can take
many forms, from working with children with (4)
animal hospital, or planting trees. (5)
2012 Olympics, up to 70,000 (6)
difficulties, in an
London won its bid to host the
were needed to help ensure the games
were a success.
c. contribute
c. learning
c. Where
c. foreigners
d. profit
d. learnt
d. What
d. volunteers
3. a. comfort
4. a. learn
b. benefit
b. learned
b. While
5. a. When
6. a. donors
b. visitors