:)
We ... do our homework.
You ... draw on the exhibits.
mustn't
I'm not sure, but it ... be a bad idea.
might
We ... drive there, or we ... take the metro.
could
or
can
... we have some soup for lunch?
Shall
or
Should
I ... have pizza for breakfast, or even chocolate cake!
might
You ... scream at the museum director.
mustn't
She ... do her homework now, instead of doing it later. (but she doesn't have to)
ought to
or
should
You ... go to bed earlier. (but you don't have to)
ought to
or
should
... we look at the answers to the exam?
May
or
Can
They ... have some chocolate, but we're not sure.
may
or
might