Either you or the headmaster _____ the prize to these gifted students at the meeting．
| A．is handing out | B．are to hand out |
| C．are handing out | D．is to hand out |
Mr. Mason, who holds the office of chairman, has _____ heavy a work load that it is difficult for him to travel.
| A．such | B．so | C．quite | D．much |
Beer is the most popular drink among male drinkers, _____ overall consumption issignificantly higher than that of women.
| A．whose | B．which | C．that | D．what |
I hope all the precautions against air pollution, _____ suggested by the localgovernment, will be seriously considered here.
| A．while | B．since | C．after | D．as |
You see the lightning _____ it happens, but you hear the thunder later.
| A．the instant | B．for an instant | C．on the instant | D．in an instant |
It is useful to be able to predict the extent _____ a price change willaffect supply and demand.
| A．fromwhich | B．withwhich | C．towhich | D．for which |