47. Which country is _______: Mexico or Costa Rica?

      A. big                               B. the bigger                 C. bigger                       D. the biggest

48. Wyoming has even _______ North Dakota has.

      A. more few residents than                                    B. fewer residents than

      C. fewer residents as                                              D. residents fewer than

49. He spent a year in India and loves spicy food _______ the food is, _______ he likes it.

      A. The hottest / the most                                        B. The hotter / the more

      C. Hottest / most                                                    D. Hotter / more

50. Although several methods have been applied, the water seems to be _______.

      A. more than polluted                                            B. so as polluted

      C. more as polluted                                               D. more and more polluted