He found it increasingly difficult to read，________ his eyesight was beginning to fail.
A．though B．for C．but D．so
Goals have to be realistic ________ students can reach them and feel a sense of achievement.
A．so long as B．so that
C．now that D．even though
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
