--How long has Robert _______? ---Since 2000.
| A．been to Beijing | B．joined the art club |
| C．become a policeman | D．studied in this school |
What do you usually use your computer _________ ?
| A．in | B．with | C．for | D．to |
Would you mind ___________ me how to start this online tour ?
| A．show | B．to show | C．showed | D．showing |
Mr Wang isn’t here , I think he __________ Shanghai .
| A．went | B．went to |
| C．has gone to | D．has been to |
--- Lily is ill in hospital .---Really ? I _____ know she was ill .
| A．don’t know | B．know | C．knew | D．didn’t know |