She ＿＿ to the office than she got down to writing the report.
| A．has no sooner got | B．had hardly got |
| C．no sooner got | D．had no sooner got |
The police __________ searching for the murderer everywhere when he suddenly appeared in a theatre.
| A．is |
| B．was |
| C．are |
| D．were |
Experiments of this kind __________ in both the U. S. and Europe well before the Second World War started.
| A．have conducted |
| B．have been conducted |
| C．had conducted |
| D．had been conducted |
After the explosion, every means __________ prevent the river from __________.
| A．is used to; polluting |
| B．are used to; polluting |
| C．has been used to; being polluted |
| D．are used to; being polluted |
We students should __________ ourselves __________ knowledge, for the competition nowadays is very fierce.
| A．supply; with |
| B．equip; with |
| C．relate; to |
| D．feed; on |
He is really considering __________ himself to __________ these children of the poor mountain village.
| A．to devote; educating |
| B．devoting; educating |
| C．devoting; educate |
| D．to devote; educate |