We _______ finish it ahead of time, though it was such a tough task.
| A．could | B．would | C．were able to | D．ought to |
I was really anxious about you. You ______ home without a word.
| A．mustn’t leave | B．shouldn’t have left | C．couldn’t have left | D．needn’t leave |
－Who is the girl standing over there?
－Well, if you ______ know her name is Mabel.
| A．may | B．can | C．must | D．shall |
. I ______ pay Tom a visit, but I am not sure whether I will have time this Sunday.
| A．should | B．might | C．would | D．could |
－Mary didn’t turn up last time, did she?
－No. She ______ . We had changed our plan.
| A．shouldn’t have come | B．needn’t have to come |
| C．didn’t need to come | D．needn’t have come |
They must have finished the work by the end of last month, ______?
| A．mustn’t they | B．haven’t they | C．hadn’t they | D．didn’t they |