It is when the plane that you’d better find out at the book office.
| A．will take off | B．is going to take off |
| C．is taking off | D．takes off |
How can I ever concentrate if you ________ continually ________ me with silly questions?
| A．have…interrupted | B．had interrupted | C．are…interrupting | D．were…interrupting |
—Excuse me, sir. Would you do me a favor?
—Of course. What is it?
—I ________ if you could tell me how to fill out this form.
| A．had wondered | B．was wondering | C．would wonder | D．did wonder |
—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 |