This machine is very easy______. Anybody can learn to use it in a few minutes.
| A．operating | B．to be operating | C．operated | D．to operate |
Please arrange an interview with the manager tomorrow，or ________ it is convenient to him.
| A．whenever | B．however |
| C．whichever | D．wherever |
—What do you think of it?
—Well，it’s worth doing ________ the result is satisfactory.
| A．the moment | B．as soon as |
| C．once | D．so long as |
________，his idea was accepted by all the people at the meeting.
| A．Strange as might it sound |
| B．As it might sound strange |
| C．As strange it might sound |
| D．Strange as it might sound |
Bring the flowers into a warm room ________ they’ll soon open.
| A．or | B．and |
| C．but | D．for |
________there is no law stating how you may dress，not all fashions are respectable.
| A．Because | B．Since |
| C．While | D．Unless |