I have no idea ________ or not he has finished the work.
| A．if | B．that | C．whether | D．which |
—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 |
I will put the book________you placed it and make a mark at the place________I put it.
| A．where；at which | B．at which；at which |
| C．where；which | D．at which；where |