How long do you think ______ the Microsoft brings out a new product?
| A．it will be before | B．will it be until |
| C．will it be when | D．it will be that |
— Is the man our sales-manager?
— No, it ______ not be him he never plays cards.
| A．must | B．can | C．will | D．may |
For quite _____ students，their teacher's advice is more important than _____ of their parents'．
| A．few；one | B．a few；that |
| C．a little；some | D．a lot；many |
He was born ____ a very cold night _____ December.
| A．in; in | B．In; of | C．on; in | D．on; of |
When he knocked at the door, my mother was busy ____ supper.
| A．preparing for | B．in preparing |
| C．to prepare for | D．to prepare |
He waited until it was dark ____ nobody could see him clearly.
| A．so that | B．in order to | C．although | D．however |