The letter was passed from one to until everyone had read it
| A．the other | B．others | C．other | D．another |
We ________ last night, but we went to the concert instead.
| A．must have studied | B．might study |
| C．should have studied | D．would study |
—I’ll tell Mary about her new job tomorrow.
—You ________ her last week.
| A．ought to tell | B．would have told |
| C．must tell | D．should have told |
On Sundays there were a lot of children playing in the park, and _______ parents were seated together joking.
| A．their | B．whose |
| C．which | D．that |
American people are wondering whether the newly-elected president and his administration will keep the nation safe and defend it _______ any terrorist attack in the future.
| A．to | B．on | C．against | D．with |
I’ll go to America to strengthen my English_______ it isn’t too expensive.
| A．except | B．provided | C．assumed | D．unless |