Calculations，which are astronomically exact，have been made ________ with the use of computers.
| A．possible | B．it possible |
| C．possibly | D．to be possible |
When parents come to visit our school last week, Tom _______ them into the classroom.
| A．was conducting | B．would conduct | C．conducted | D．has conducted |
I don’t like to ask people for help as a rule but I wonder if you could ______ me a favour.
| A．make | B．do | C．find | D．get |
The boy’s new bike is _______ envy of his friends.
| A．a | B．the | C．/ | D．an |
I’d rather have a room of my own, however small it is, than _______ a room with someone else.
| A．to share | B．to have shared | C．share | D．sharing |
________ he had not hurt his leg, John wound have won the race.
| A．If | B．Since | C．Though | D．When |