casual /ˈkæʒuəl/(a): thường, bình thường, thông thường

8. (A) According to the rules (B) of this game, you (C) don't have to (D) drop the ball. DẠY KÈM QUY NHƠN OFFICIAL 9. This competition is (A) optional, so we (B) not (C) have to take part in (D) it. 10. My (A) advice is you (B) have to consider carefully (C) before (D) making the final decision. Bài 4: Fill in the blanks with "must" or "have to". 1. Professor Quang told me today that I__________give in that assignment by Friday at the latest. 2. Mark! This is a one way street. You__________turn back and use Le Loi Street. 3. My back has been hurting for weeks. I __________go to the doctor's. 4. My company said that if I want this promotion, I__________go to the doctor's for a thorough medical check-up first. 5. I went to see "Titanic" at the cinema last night. What a great film! You__________go and see it! 6. Linda, thanks for everything. It was a great party. I__________go now. My husband is waiting for me outside. 7. I am taking out a bank loan this month. I__________pay a lot of taxes all together. 8. The local council is really strict about protecting that piece of lawn! You__________walk around it! Bài 5: Fill in the blanks with affirmative or negative forms of "must or have to/ has to". 1. You really__________stop driving so fast or you'll have an accident! 2. I can give you my bike, so you__________buy a new one. 3. They__________be in a hurry, because they have got more than enough time. 4. I really__________remember to post that letter before five o'clock. 5. Tomorrow is Sunday. You__________get up very early. 6. This room is a mess. I really__________find time to clean it! 7. You__________wear a tie if you want to go to that restaurant. It's one of their rules! 8. I am broke. I__________borrow some money to buy a car. 9. You__________stop smoking. It is very harmful. 10. Mr. Dickson is travelling abroad this summer, so he__________get his passport soon. 11. All the students__________obey the school rules. 12. You__________speak too loud, the baby is sleeping. 13. Students__________look at their notes during the test. 14. I have a terrible headache, so I__________leave early. 15. Snow has blocked the roads. We__________stay here until it's cleared. Bài 6: Rewrite each sentence using the word(s) in the brackets. 1. I am not allowed to go out in the evening, (mustn't)  I ____________________. 2. It is a good idea for US to take an umbrella with US when we go out. (should)  We ____________________. 3. It is necessary for young people to plan for their future, (have to)  Young people ____________________. 4. Ms. Hoa is in charge of cleaning the floor every day. (has to)  Ms. Hoa ____________________. 5. Tim doesn't get permission to use that computer, (mustn't)  Tim ____________________. English 11