1. Which part of the following sentence is the adjective clause?
    There’s a story behind the blue, white, and green plastic covering the surface of the Pacific Ocean vacuum cleaner.
    1.   There’s a story
    2.   behind the blue, white, and green plastic
    3.   covering the surface
    4.   the surface of the Pacific Ocean vacuum cleaner
    5.   covering the surface of the Pacific Ocean vacuum cleaner
  2. Which word does the underlined adjective clause modify in this sentence?
    Tiny bits of plastic collected from Kahuku beach in Hawaii were used to make vacuum cleaner covers.
    1.   Tiny
    2.   bits
    3.   plastic
    4.   vacuum cleaner
    5.   covers
  3. The machine ______ is made by Electrolux AB is fully functional.
    1.   what
    2.   whose
    3.   whom
    4.   who
    5.   which
  4. Kahuku is the one of the Hawaii’s dirtiest beaches ______ waves dump trash from the Pacific all day long.
    1.   which
    2.   where
    3.   who
    4.   that
    5.   when
  5. Summer was the time ______ most trash was collected from the beach.
    1.   what
    2.   where
    3.   why
    4.   when
    5.   that
  6. Volunteers were beachgoers ______ wanted to help clean up the dirty beach.
    1.   why
    2.   how
    3.   who
    4.   when
    5.   where
  7. Which sentence contains the adjective clause that gives additional information to the whole sentence? (sentential relative clause)
    1.   Electrolux made use of plastic trash which was collected from a dirty beach in Hawaii.
    2.   Electrolux recycled plastic trash collected from a beach, which amazed everyone.
    3.   Plastic that was used to make this vacuum cleaner came from used drinking bottles.
    4.   Electrolux, a well-known electrical company, produces vacuum cleaner covers from used plastic.
    5.   Do you know the shop where I can buy one of those Pacific Ocean vacuum cleaners?
  8. Which phrase can replace the underlined adjective clause in the following sentence?
    The cover of a Pacific Ocean vacuum cleaner, which is a new product from Electrolux, is made from plastic trash.
    1.   which a new product from Electrolux
    2.   is a new product from Electrolux
    3.   being a new product from Electrolux
    4.   a new product from Electrolux
    5.   to be a new product from Electrolux
  9. Which phrase can replace the underlined adjective clause in the following sentence?
    None of the five new vacuum cleaners which are produced from this company are for commercial sale.
    1.   which are produced
    2.   producing from this company
    3.   to produce from this company
    4.   which from this company
    5.   from this company
  10. Which phrase can replace the underlined adjective clause in the following sentence?
    This company has found an efficient method which can be used to recycle plastic trash.
    1.   which to be used to recycle plastic trash
    2.   to recycle plastic trash
    3.   recycling plastic trash
    4.   be used to recycle plastic trash
    5.   recycling plastic trash