You must keep on working in the evening, you are sure you can finish the task in time.
| A．as |
| B．if |
| C．when |
| D．unless |
At the end of the meeting, it was announced that an agreement ________.
| A．has been reached | B．had been reached | C．has made | D．signed |
----She looks happy. She _______ have passed the exam.
-----I guess so. It is not difficult after all.
| A．should | B．could | C．must | D．might |
Choosing the right dictionary depends on ______ you want to use it for.
| A．what | B．why | C．how | D．whether |
More than a dozen students in that school _______ abroad to study medicine last year.
| A．sent | B．were sent | C．had sent | D．had been sent |
----Why did you leave that position?
----I ______ a better position at IBM.
| A．offer | B．offered | C．am offered | D．was offered |