I told Sally how to get here, but perhaps I ______for her.
| A．had to write it out | B．must have written it out |
| C．should have written it out | D．ought to write it out |
You __________be tired—you’ve only been working for an hour.
| A．must not | B．won’t | C．can’t | D．may not |
—I’m afraid you missed a fantastic lecture yesterday. How come you were absent from it?
—If you _______ know, I asked for a day off and visited a relative of mine in hospital.
| A．might | B．may | C．shall | D．must |
Why _______ you be so stubborn? You should think over my advice on this matter.
| A．may | B．shall | C．dare | D．must |
Keep up a good state of mind even if you ______ fail plenty of times.
| A．should | B．will | C．must | D．need |
Lora，you ____________ leave all your books on the floor like this!
| A．wouldn’t | B．mustn’t | C．needn’t | D．may not |
— It’s no easy task to catch a ticket on a website that receives 1 billion clicks daily.
—I can’t agree with you more. There ________ be errors for every single step.
| A．should | B．must | C．will | D．can |
--My computer ____start, no matter how hard I try.
--It might have crashed.
| A．won't | B．shouldn't | C．mustn't | D．wouldn't |
—What did you say to your sister? I saw her crying in the room.
— It _________ my fault. I just said hello to her when I met her, nothing else.
| A．must have been | B．can’t have been |
| C．oughtn’t to be | D．should have been |
—The deadline is drawing, but I failed to challenge the task a third time.
— ______ my brother have a try?
| A．Will | B．May | C．Shall | D．Must |