1
.
he
arrived
____________________
to
class
because
he
had
a
problem
at
home
.
2
.
they
can
play
the
guitar
____________________
because
they
took
many
lessons
3
.
this
is
an
____________________
activity
4
.
we
have
to
wait
____________________
while
the
teacher
arrives
to
class
5
.
I
always
walk
____________________
when
I
am
tire
d
