---I called you yesterday. A woman answered, but I didn’t recognize her voice.
----Oh, it _____ my aunt Jean.
| A．must be | B．must have been |
| C．might be | D．can have been |
—Which flight ________ ? —I want to catch the 13:00.
| A．you are to catch | B．are you catching | C．do you catch | D．have you caught |
—You must have met him the other day. —Oh, no, I ________ .
| A．hadn’t | B．mustn’t | C．haven’t | D．didn’t |
— Have you ever worked with a tape recorder?
— I ________ it a lot when I was studying French in school.
| A．used | B．was used | C．have used | D．had used |
— I called you at ten, but there was no reply.
—Oh, that was probably when I ________ a shower.
| A．am taking | B．took | C．were to take | D．was taking |
—Could you tell me how your father usually goes to work?
—Yes. If it is fine, he ________ to his office.
| A．will walk | B．will go on foot | C．walks | D．would go on foot |