The factory _________ since two years ago.
| A．has been open | B．has opened |
| C．was open | D．opened |
–Where is your father?
– He _________ Australia and he_________ Sydney for two weeks.
| A．has been to; has been in |
| B．has gone to; has been in |
| C．has been in; has been to |
| D．has gone to; has been to |
– How long has Robot _________ ?
– Since2004.
| A．been to Beijing | B．become a policeman |
| C．joined the Art Club | D．studied in this school |
Great changes _________ in Nanjing since the1990s.
| A．took place | B．were taken place |
| C．have taken place | D．have been taken place |
My mother _________ a history teacher.
| A．used to being | B．is used to being |
| C．used to be | D．is used to be |