Reading Comprehension
        A     Choose the correct answers.
              2. What is NOT a problem with landfills?
                          a       They can poison the air, land, and water.
                          b       People need a lot of training to work at
                                  them.
                           c      The waste in them does not break down
                                  quickly.
                                                                                                                                          Unit 5 | Opinions About Waste