It was announced that only when the fire was under control __________to return to their homes.
| A．the residents would be permitted |
| B．had the residents been permitted |
| C．would the residents be permitted |
| D．the residents had been permitted |
—Good morning. I've got an appointment with Miss Smith in the Personnel Department.
—Ah, good morning. You ________ be Mrs. Peters.
| A．might | B．must |
| C．would | D．can |
It ________be the postman at the door.It's only six o'clock.
| A．mustn't | B．can't |
| C．won't | D．needn't |
It ________ be the vocabulary that caused you the problem in the exercise because you know a lot of words.
| A．may | B．couldn't |
| C．should | D．needn't |
—What are you doing this Saturday?
—I'm not sure, but I ________ go to the Rolling Stones concert.
| A．must | B．would |
| C．should | D．might |
I'm going to Europe on vacation together with John if I ________ find the money.
| A．can | B．might |
| C．would | D．need |