Có một Với câu trả lời và không có câu trả lời ấn bản mỗi ba cấp độ. Nếu không có các câu trả lời phiên bản lý tưởng cho các bài tập về nhà, và với câu trả lời ấn bản để nghiên cứu tự. | c 1 You mustn t take 2 You mustn t make 3 You mustn t write 4 You must arrive 5 You must bring D 1 mustn t must not tell lies 2 must not mustn t open the door 3 must come for dinner with US 4 must show identity cards 5 mustn t must not eat 6 must follow the instructions 7 must write Unit 23 A 1 don t have to deal with 2 don t have to be polite 3 have to be polite 4 have to work 5 have to work 6 don t have to work 7 have to wear 8 don t have to wear B 1 I didn t have to work 2 Do I have to do 3 I had to run 4 I had to go 5 Did you have to show 6 Do Will I have to pay 7 do you have to have 8 You don t won t have to decide 9 I had to wait 10 Do you have to work. I had to work c 1 You have to fill in an application form. 2 Doi have to give you a photograph 3 No you don t have to give me anything except the money for the card 4 We had to do some English tests. 5 How many questions did you have to answer 6 We had to answer about 40 grammar questions. 7 I had to think about them very carefully. 8 Did you have to write a composition 9 No but we ll have to we have to do one next week. Unit 24 A 1 You shouldn t park 2 should I cook 3 You should wear 4 You shouldn t smoke 5 We should arrive 6 Should I pay 7 I should apply 8 I should write 9 I shouldn t eat 10 We should complain 11 I should buy B 1 You should cut 2 You should use 3 You shouldn t put 4 You should wait 5 You should heat 6 You should cut c 1 Which papers should I get 2 I think you should buy the local newspapers. 3 What do you think I should do before I buy a bike 4 I don t think you should decide too quickly. 5 You should check the condition of the bike. 6 You should ask somebody who knows about bikes to look at the bike for you. 7 You shouldn t buy one simply because it looks nice 8 You should be very careful. Unit 25 A 1 couldn t play 2 can t cook 3 can t give 4 couldn t see 5 can do 6 can play 7 can t find 8 couldn t understand 9 couldn t go. couldn t afford 10 couldn t do 11 can t talk B 1 She can t see .
