—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
________ you may have，you should gather your courage to face the challenge.
A．However a serious problem
B．What a serious problem
C．However serious a problem
D．What serious a problem
