Great changes () in our country since twenty years ago.

单项选择题Tom's parents will be back from London ().

A．long before
B．before long
C．before soon
D．soon after

单项选择题The car runs () 80 kilometres an hour,

A．at
B．in
C．with
D．on

单项选择题The teacher can () believe that Tom studies so ().

A．hardly; hardly
B．hard; hardly
C．hardly; hard
D．hard; hard

单项选择题Some good advice () the students by the teachers in this school.

A．were given
B．were given to
C．was given
D．was given to

单项选择题The teacher () the map on the blackboard.

A．hang
B．to bang
C．hung
D．hanged