Choose the best modal to complete each sentence.
1. Your music is too loud. ____ I turn it down a little bit?
a. Might b. Could c. May d. Must
2. The school gate closes at 7:30 am. We ____ be there before it does.
a. Have to
b. Must
c. Has to
d. Must not
3. This area is for authorized personnel only. You ____ come in.
a. May not
b. Must not
c. Can't
d. Could not
4. I study hard for the exam tomorrow if I want to get good grades.
a. Have to
b. Must
c. Should
d. Can
5. I ____ talk back to my parents. It is rude.
a. May not
b. Must not
c. Can't
d. Could not
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