1. I always brush my teeth ___ I go to bed.
before
when
until
after
2. When Jane came home, Martin was very tired, because he ___ hard all day.
were
have been
was
had been working
3. You are covered with dirt! What ___?
you have done
has you been doing
do you do
have you been doing
4. I saw an accident ___ I was walking home.
when
before
since
after
5. I ___ my homework so now I can go meet my friends.
did
done
have done
was doing
6. Tomorrow from 8 to 10 p.m. I ___ a new movie.
will be watching
will watch
have watched
am going to watch
