Choose the word(s) OPPOSITE in meaning to the underlined words in each of the following questions. 

1. If you work hard, we’ll make this beach a clean place again.

      A. beautiful                    B. tidy                                  C. polluted                           D. clear

2. You should use public buses instead of motorbike to reduce air pollution.

      A. increase                     B. decrease                           C. minimize                         D. make less

3. Polluted water is harmful to people’s health and kill fish.

      A. useful                        B. unsafe                              C. bad                                   D. dangerous

4. Everyone should protect our environment.

      A. conserve                    B. save                                 C. destroy                             D. take care of

5. We should try our best to keep our environment unpolluted.

      A. clean                          B. safe                                  C. fresh                                D. polluted