There is a mistake in the four underlined parts of each sentence. Find the mistake

1. We shouldn’t break our good costumes on Tet holiday.

               A            B                        C          D

2. While Tom came to my home, I was playing video games with my friends.         A                  B                                  C                                 D

3. The Khmer should float lanterns; otherwise, they aren’t get good luck.        

                             A      B                         C                    D

4.  The ancestors have to maintain their traditions by teaching their offspring.         

                                    A               B                                            C                              D