IV. Find one mistake in each sentence below.

1.         Last week my friend and I go to the beach by bus.              

                                               A        B     C                 D

2.         While I am listening to music, I heard the doorbell.

                          A                 B                  C                 D

3.         In Australia, you mustn’t to comment on a person’s accent.

                                             A             B              C      D

4.         We should make some posters and hang it around our school.

                                 A                           B           C     D

5.         If you are interested on helping, just show up on Saturday.

                        A           B                                   C               D

6.         Many Vietnamese people prepare for the holiday by pay their debts and cleaning their homes.

                              A                             B                                 C                                D

7.         Because it was crowded, I really enjoyed the festival.                    

                 A                        B           C          D

8.         I think that she prefers going to the cinema to watch TV.

                                          A         B                        C      D