Choose the correct answer A, B, C or D for each gap in the passage

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IV. Choose the correct answer A, B, C or D for each gap in the passage. (1,5pts)
Homelessness is a problem in many big cities in the world. It occurs when a part of the
population does not have any (17)
place to call home. Hundreds of millions of
people in the world spend at least some time of the year homeless. This is an issue that the
authorities are trying to (18)
However, there are (19).. ... things that each
person can do to help those people. One of the things that you can do to help the homeless is
to volunteer your time. If you have a lot of free time, you might go on an extended trip to
help (20) ....
homes or improve an impoverished area. Even with just a few hours a
week, it is possible to make an impact in your own city. You can also sign up to help at a
(21)
soup kitchen: most cities have a mission of some kind (22)..
food to the homeless and offering temporary shelter.