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43 Answer the questions according to the model:

M odel: A.: I have already published my findings. Have you?

B.: I have not published my findings. I’ll have published them by the end of the month.

1 I have already changed my method of research. Have you? 2 I have already counted the red blood cell. Have you? 3 They have completed their investigations. Have they?

44 Put the verbs in brackets into the present perfect. All the verbs are regular:

1 I … never hard for this exam (work). 2 … Jenny … your letter? (answer). 3 She likes him but she … never … him (love). 4 You … very hard. You can do better work than this (not/try). 5 Why are the police here? What … (happen). 6 My cousins are coming this weekend. They … with me before (not/stay). 7 She … university and … working in London now (graduate from/start). 8 Thank you for everything. You … me a lot (help). 9 … you … the dishes (wash)? 10 I … everything to Derek and I think he understands (explain). 11 Please stay for dinner. Oliver … a lovely meal (cook). 12 It’s nice to see you here but why … you … me before (not/visit)? 13 She … a lot in her life (travel). 14 We … often … along this road (walk). 15 … you … to phone your mother (remember)?

45 Put the verbs in brackets into the present perfect tense:

1 Where do you (be)? – I (be) to the dentist. 2 He just (go) out. 3 Someone (take) my bicycle. 4 The cat (steal) the fish. 5 There aren’t any buses because the drivers (go) on strike. 6 How many bottles the milkman (leave)? – He (leave) six. 7 How long you (know) Mr. Pitt? – I (know) him for 12 years. 8 Would you like some coffee? I just (make) some. 9 You never (ride) a camel? 10 I (buy) a new carpet. Come and look at it. 11 I often (see) him but I never (speak) to him. 12 We just (hear) the most extraordinary news. 13 I (not/pay) the telephone bill yet. 14 Mary never (fly) a plane. 15 He (not/smoke) for a fortnight. He’s trying to give it up. 16 The play just (begin). You are a little late. 17 It (be) very cold this year. I wonder when it’s going to get warmer. 18 You (get) the best voice I ever (hear).

46 Supply already or yet:

1 The scientists have introduced this term. 2 The researchers have not found out the origin of this disease. 3 The people have estimated the importance of this great discovery. 4 They have not published the book on their discoveries.

47 Choose the necessary place for parenthesized words:

1 Our lectures take place in that hall (usually). 2 He comes home at 5 o’clock (always). 3 We are late (seldom). 4 His friend is ill (often). 5 They air the wards in the morning (usually). 6 We read English magazines (sometimes). 7 After classes our reading-room is full of students (always). 8 We have been in this museum (never). 9 I go to this library (often). 10 They have a rest on Sunday (usually).

48 Fill in the blanks with already or yet:

1 Has she gone to bed …? – No, she is still watching TV. 2 What? Is she here …? She is early. 3 Good heavens! Have you cleaned your room …? 4 Has the postman come …? – Ask Granny, she’s been at home all the time. 5 Our new teacher is a real beauty. – Have you seen her …? 6 Have the children gone to bed …? That’s strange. 7 Is it two o’clock …? Oh, I’ll be late again. 8 I can’t believe my eyes. Have you finished the washing up …? 9 Have you cleaned your room …? – I haven’t, but I’ll clean it later. 10 Have they arrived …? – I don’t know. 11 Have you seen his wife …? – No, she is arriving tonight.

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