1. Emily ___could__ swim when she was two.
must
can
could
2. She __can___ be angry if you do that.
may
might
can
3. You are not very well. Perhaps you ___should__ see a doctor. *
must
have to
should
4. Students ___mustn't__ run in the class. *
can
must
mustn't
5. You ___don't have to__ wait for me. I can get a taxi. *
doesn't have to
don't have to
must
6. We __ought___ to study the problem and look for a solution together. *
must
should
ought
7. ___Could__ you, please, pass me the mustard? *
Might
Could
Can