I. Rewrite the following sentences, using the word in the bracket. 1 We have to pay the electricity bill before Friday.( MUST)  We………………………………………………………….. 2 You don't need to buy me a birthday present. ( NECESSARY)  It………………………………………………………………. C You mustn't buy me a birthday present. 3 I have to do some work on my project this evening.( NEED)  I …………………………………………………………………………….. 4 .Lenny didn't have to see the head teacher after all. ( NECESSARY)  It ………………………………………………………………………….. 5 Students mustn't run in school buildings. ( allowed)  Running ………………………………………………………………… 6 All passengers must fasten their seatbelts. (Have to)  All passengers………………………………………………………………………….. 7 .Mr Reed had to go to the police station to answer some questions. (WAS)  Mr Reed …………………………………………………………………………….. 8. It's kind of you to offer to help, but you really don't need to. ( Necessary)  Your ……………………………………………….. 9. You have to take your hat off when going inside the main worship area of the temple. ( ALLOWED)  You're ……………………………………………………………………………………………. 10. You don't have to tip in Viet Nam. ( NECESSARY)  It's ………………………………………………………………………………………….. 11. Students mustn't run or be noisy in the school building. ( allowed)  Running …………………………………………………………………………………….. 12. In the past, Vietnamese people had to live with their parents even after they got married.( OBLIGED)  In the past, Vietnamese people ……………………………………………………………………..