1.

Peace Corps volunteers ...

  help poor people around the world.
  live and work in Europe.
  build schools in Africa.

2.

The most rewarding thing for Liza is ...

  understanding what people say.
  finding a way to fit into a community.
  learning about another culture.

3.

What is it troublesome for Matt?

  To find an interpreter.
  To find an English speaker.
  To learn the only dialect.

4.

What are people there like?

  Not very sincere.
  Shy at first.
  Most interesting.