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Question 25: The play was so bored that all the audience had gone home before it ended.

                                                     A                       B                   C                              D

Question 26: I suggest that your drivers should clearing up all the trash on the ground before leaving.

                                                          A                      B                       C                                               D

Question 27: Preserving natural resources mean reserving them for our future.

                                             A                          B          C                    D

Question 28: She is reading the book about love on the Web, doesn’t she?

                             A               B                              C                       D