Mr
Williams
often
(
to
teach
)
____________________
the
dogs
new
tricks
.
They
always
(
to
throw
)
____________________
their
litter
in
the
bin
.
The
referee
usually
(
to
stop
)
____________________
the
game
after
90
minutes
.
The
kids
(
to
hurry
)
____________________
to
open
their
presents
.
This
car
can
(
to
do
)
____________________
250
km
/
h
.
