Lesson VII

1. Rewrite the sentences, using must have.

e.g. The door's open! ‑ You must have left it open.

1. My torch isn't here! (to borrow) 2. The plates are all clean! (to wash up) 3. What are all these books doing here? (to leave) 4. The teapot is in pieces! (to drop) 5. How shiny the furniture looks! (to polish) 6. The steps are unusually clean! (to sweep) 7. There are some sandwiches on the kitchen table! (to make) 8. There are no biscuits left! (to eat) 9. And there's no whisky left! (to drink) 10. The car is in a terrible state! (to drive into a wall) 11. The clock is going again! (to wind) 12. The bath's overflowing! (to leave the tap on)

2. Complete the sentences using must have or can't have and the verb in brackets,

1. She didn't answer the door bell even though I rang several times. She... (to be) asleep. 2. I... (to run out of) petrol. I only filled up the tank this morning. 3. I'm so sorry I'm late. You... (to wonder) what had happened. 4. Cathy's got a new BMW! She... (to win) a lottery. 5. I... (to lose) my glasses. They were here a minute ago. 6. The flowers are beautiful! They... (to cost) you a fortune. 7. Alan... (to get lost). I gave him the address and drew a map.

3. Fill the spaces in the following sentences by using must, can't and needn't + perfect infinitive of the verbs in brackets.

1. Did you hear me come in last night? ‑ No, I... (to be) asleep. 2. I wonder who broke the wineglass; it... (to be) the cat for she was out all day. 3. You... (to help) him. (You helped him but he didn't need help.) 4. I had my umbrella when I went out but I haven't got it now. ‑ You... (to leave) it on the bus. 5. He... (to escape) by this window because it is barred. 6. I... (to give) £ 10. £ 5 would have been enough. 7. I saw a rattlesnake near the river yesterday. ‑ You... (to see) a rattlesnake. There aren't any rattlesnakes in this country. 8. He is back already. ‑ He... (to start) very early. 9. I bought two bottles of milk. ‑ You... (to buy) milk; we have heaps in the house. 10. I phoned you at nine this morning but got no answer. ‑ I'm sorry. I... (to be) in the garden. 11. I left my bicycle here and now it's gone. ‑ Someone... (to borrow) it. 12. When she woke up her watch had vanished. ‑ Someone... (to steal) it while she slept. 13. I've opened another bottle. ‑ You... (to do) that. We've only just started this one. 14. Perhaps he swam across. ‑ No, he... (to do) that; he can't swim. 15. Do you remember reading about it in the newspapers? ‑ No, I... (to be) abroad at the time. 16. He... (to walk) from here to London in two hours. It isn't possible. 17. We went to a restaurant and had a very good dinner for £ 3. ‑ You... (to have) a very good dinner if you only paid £ 3. 18. I have just watered the roses. ‑ You... (to water) them. Look, it's raining now! 19. That carpet was made entirely by hand. ‑ It... (to take) a long time. 20. The door was open. ‑ It... (to be) open. I had locked it myself and the key was in my pocket. 21. He said he watered the plants every day. ‑ He... (to water) them. If he had they wouldn't have died. 22. We've sent for a doctor. ‑ You... (to send) for him. I am perfectly well. 23. I've made two copies. ‑ You... (to make) two. One would have been enough. 24. I had to get down the mountain in a thick fog. ‑ That... (to be) difficult. 25. I saw Ann in the library yesterday. ‑ You... (to see) her; she is still abroad. 26. You... (to lend) him your map. He has one of his own. 27. He was found unconscious at the foot of the cliff. He... (to fall) 200 metres. 28. Jane took Spot for a walk and he disappeared. He... (to steal). 29. Lucy looks upset. She... (to give) a bad mark. 30. I found this book on my desk when I came to room. It... (to leave) by one of the students in the earlier lesson.

4. Study the key words.

optical	density
magnetic field	access time
capacity	duplicate
double layer	perceive

5. Read the text and translate it.

Дата добавления: 2015-07-20