must, have(has) to.
1. I _ give up smoking.
2. I _ give up smoking - that's doctor's order.
3. You _ get a visa to enter the United States.
4. Annie _ do her homework now.
5. It's getting Late. we _ go now.
6. You really _ work harder if you want to pas the exam.
7. Some children _ wear uniforms when they go to school.
8. He doesn't feel well. I _ call a doctor.
9. I can't come tomorrow. I_ work late.
10. Julie _ go to work on foot. The buses are on strike.
11. Secretaries _ answer the phone. That's part of their job.
12. "You _ do your homework" said the teacher.
13. "We _ invite our neighbors for dinner one day" said my husband.
Answers & Comments
2 i must ___
3 must
4 has to ___
5 have to ___
6 have to ___
7 must
8 have to ___
9 must ___
10 has to ___
11 must
12 must
13 have to ___