Complee tthe sentences with tag question

1.                   Complee tthe sentences with tag question.

                                  1. they used to work in this company……………?    

                                  2.You and I always suppot each other,……………..?

                                  3. I have just made a mistake……………………?

                                  4. my brother has paid your money back………………?

                                  5. his elder brother can dance…………………….?

                                  6. you shouldn’t drink too much iced tea………………?

                                  7. you mustn’t cheat in the exam,………………………?

                                  8. He could have bough a new bike………..?

                                  9 You classmates will come and visit our house this Sunday moring………………….?