. It isn't so much whether he works hard; the question is whether he works _____.
| A．above all | B．in all | C．at all | D．after all |
In fact, is really a hard job for the police to keep order in an important football match．
| A．this | B．that | C．there | D．it |
They considereda computer, which was considereda great help in their work．
| A．to buy; to be | B．buying; being | C．to buy; being | D．buying; to be |
The number of people invited __________ fifty, but a number of them _______ absent for different reasons.
| A．were… was | B．was… was |
| C．was… were | D．were… were |
The place was flooded ________ it had been raining for several weeks.
| A．because | B．because of | C．ever since | D．as a result of |
Mr. Smith has been here for only a few days, so he hasn’t left a deep impression _____ us.
| A．on | B．with | C．about | D．for |