Please be quiet!The students______ an exam.( )
take
are taking
took
were taking
There ______ a football game in our city next week.( )
will have
will be
is going to have
are going to be
Tu Youyou is the first Chinese to win the Nobel Prize in Medicine,she ______ by more people nowadays.( )
know
knows
is known
was known
My father used to drive to work,but he is used to ______ now.( )
walking
walked
walks
walk
You ______ stop when the traffic light is red.( )
can
could
may
must
Study hard,______ you won't catch up with your classmates.( )
and
or
but
if