—How many workers are there in your factory, Mr Brown?
—________ workers in our factory _________2000.
| A．The number of; are | B．The number of; is |
| C．A number of; are | D．A number of; is |
The students hurried to the classroom the bell rang.
| A．until | B．as soon as | C．if | D．so that |
We were angry him for keeping us waiting
| A．with | B．at | C．for | D．on |
Tony is ________ to go to school.
| A．enough old | B．old enough |
| C．enough young | D．young enough |
Sam worked until midnight yesterday. So he feels ______ today.
| A．sleep | B．asleep |
| C．sleepy | D．sleeping |
He failed the exam ________he was too careless.
| A．because | B．but |
| C．so that | D．so |