Write the correct modal verb

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Z tieng anh class
I. Write the correct modal verb:
E 1. I
ride a bike. I always fall off.
c. don't have to
a. may not b. can't
E 2. You look sick, you
a. should
3. Remember, you are in a library. You
see a doctor.
b. can
c. may
speak loudly.
a. must
b. mustn't
c. don't have to
4. Don't forget to take an umbrella. It
Irain later.
c. might
chew gum in class.
a. may not
b. can't
S 5. We
a. shouldn't b.
must
c. don't have to
6. You
make pancakes. I've already made some.
a. may not b. can't
c. don't have to
E 7. Students
take exams twice a year.
а. can
b. must
c. may
8. Sorry, I
come yesterday.