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A. Choose the correct answers.
1. I don’t have a backpack. I _____________ buy a backpack for the trip.
mustn’t
don’t have to have to
2. Astronauts _____________ wear special suits.
has to
must
doesn’t have to
3. You _____________ steal other people’s money.
must
mustn’t
don’t have to
4. Jackie’s coat still looks new. She _____________ get a new coat.
has to
have to
doesn’t have to
B. Choose and complete the sentences.
mustn’t
have to
has to
don’t have to
doesn’t have to
1. Bobby’s room is dirty. He ____________________________________ clean it.
2. We ____________________________________ be late for school.
3. It’s warm today. You ____________________________________ wear a thick coat.
4. My new shirt is the wrong size. I ____________________________________ change it.