．I thought we’d be late for the concert, ______ we ended up getting there ahead of time.
A．but B．or
C．so D．for
Modern equipment and no smoking are two of the things I like______working here.
A．with B．over
C．at D．about
Jane said she would come here ________ 9:00 and 9:30 tomorrow morning.
A．from B．at
C．between D．around
He turned ________ the radio because his father was asleep.
A．on B．down
C．up D．over
The accident took place ________ a cold February evening.
A．on B．in
C．at D．for
______ the maths problem is difficult， I'll try very hard to work it out.
A．Though B．When
C．Before D．After
