.
-----------Who invented _______ cell phone?
----------I don’t know. Maybe _______ European.
| A．the; an | B．the; a | C．/; / | D．a; the |
I’d appreciate _______ if you could let me know in advance whether or not you will come.
| A．it | B．you | C．one | D．this |
By the time he gets home, his father _____________ for Pairs on business.
| A．has left | B．will have left |
| C．had left | D．will leave |
Never before in our country _______________.
| A．has such a thing happened | B．such a thing has happened |
| C．has so a thing happened | D．so a thing has happened |
—We'd better go downstairs right now for lunch.
— ______ They serve food 24 hours a day.
| A．Hurry up! | B．Take your time. |
| C．No way! | D．It doesn't matter. |
Many shops and restaurants offer ______ prices every day to promote business.
| A．clear | B．regular |
| C．particular | D．special |