The agent was about to sign his name to the document ________，to our surprise，a stranger broke in to prevent him.
A．while B．when
C．as D．until
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
