—Did Ann fail in English?
—She ____. Don't you notice that she looks depressed?
| A．might | B．must | C．may have | D．could have |
Cars, buses and bikes ________ stop when the traffic lights turn red.
| A．can | B．may | C．must | D．need |
_______ we got to the station, the train had left already.
| A．If | B．Unless | C．Since | D．When |
Tom kept quiet about the accident _____ lose his job.
| A．in not order to | B．in order not to |
| C．in order to not | D．not in order to |
He is very old, ______ he still works very hard.
| A．but | B．if | C．when | D．as |
I rang you several times yesterday but couldn’t ______.
| A．get on | B．get down | C．get through | D．get to |