1. Would you like go to the concert with my friends tonight? B = going

            A               B                            C                       D

2. Do you want to go to the library with us at Friday? D=on

         A                   B             C                     D

3. Lan failed her English test. She should to study harder.

                   A                  B                      C                   D

4. They didn’t went  to  the  cinema  last night.

                       A           B             C               D

  4.  My father used to smoking  a lot of cigarettes  when he was young.

                                            A                    B                C          D