10 i don’t know about these people.
11 he comes here times a week because he has free time.
12 we are destroying trees and forests.
13 we use electricity.
14 we burn coal.
15 people put chemicals into the seas.
16 there is very juice left. i must buy some.
17 there is coke in the bottle. do you want some?
решите

18 she hasn’t got homework today.
19 i need eggs and butter to make a cake.
20 people can’t find jobs nowadays.

1 I can't translate this article because i don't have a dictionary. 2 may I see Bill? Certainly. You can find him in the reading hall. 3 I can remember many words at once. 4 yesterday I couldn't come to you because I was busy. 5 he can't go quickly. He is tired. 6 can you sing? Yes, I can. Can you take part in the concert tomorrow? Of course, with pleasure. 7 can you help me to lay the table? I am sorry but I am in a hurry and I can't help you now. 8 I wonder if he can do this work himself 9 if you work hard, you will able to speak English well soon. 10 I couldn't get tickets to the theatre yesterday. 11 my friend can't drive a car well. 12 he is unlikely to have made such a mistake. 13 he couldn't read Latin and understand what the doctor prescribed him 14 could you give me your dictionary? I will return it the day after tomorrow. 15 can she really be the little Lizzy? How much she has grown. 16 can I see the manager? Unfortunately, no. He will be by 12. 17 unfortunately, I can't remember anything about her. It was so long ago. 18 can you roller skate? No, I can't. Neither can I. But Tom can. 19 here it is forbidden to cross the street. Please, go to the passage underground. 20 in spite of difficulties he was able to achieve a lot. 21 he couldn't explain us anything. 22 I can't carry this bag. It is too heavy. 23 he will able to call you only late in the evening. 24 he can't be here anymore. It is very dangerous. 25 I won't be able to believe you until you show me this letter. 26 they can't have noticed us. We were too far away. 27 can you drive a car. No, I can't. I am learning. 28 if the weather doesn't change, we won't be able to go picnicking on Sunday. 29 you can go there on foot. It will take you 10 minutes. 30 it is forbidden to leave a car here. 31 it is possible to get to the city by bus. 32 some parrots can pronounce words and even phrases. 33 could he really be involved in this case? 34 she can't be sleeping now. I have just seen her in the garden. 35 it can be cold in England . 36 I couldn't come to you yesterday in the evening because I had a meeting. 37 when can I talk to you? 38 he couldn't join us. He had a training. 39 could she really have told you about it herself? 40 I can't leave home. I have a fever. 41 she will able to help you if you ask her. 42 could she really be still speaking over the phone. 43 would you kindly tell me the time? 44 you could watch TV if you like. 45 he can't be late. He is always so punctual. 46 he can't have read this book so quickly. It is too hard for him. 47 you can take the dictionary. I don't need it anymore. 48 you shouldn't drink so much coffee in the evenings. 49 you can rely on him. He is a very reliable person. 50 speak louder, please. I don't hear anything.

A. 1. I can read English, but I can not write. 2. I can not answer this question. 3. Now can you speak a little French? - Yes, I can do a little. 4. He can not walk much. 5. The boy was five years old, but he could skate. 6. Could you translate this text? - Yes, I could. 7. Tom could not do it last week. 8. I could only see the picture on the wall. 9. We can have lunch with me. 10. Can you tell me about this? - No I can not. 11.Who can open the door? 12. 12. I could not go to the theater yesterday, I did not have time. 13. You can smoke here. Can you give me this book? - I'm afraid not. 15. Can I have some tea? 16. Can I ask you a question? - Of course. 17. Tomorrow you can take this magazine. 18. Please tell me how to get to Pushkinskaya Street. 19. What can I do for you? 20. Can I leave a briefcase here? - I think yes.

B. 1. I can not do this job right now, I do not have time. 2. I can not eat lunch with you now. I'm translating an article. 3. Could you go to the theater last night? 4. He could come to us last week. 5. I could see this street very well. 6. She could not write a letter to us. 7. We could not discuss this issue on Monday. 8. Kolya was able to send a telegram only in the evening. 9. We were able to talk with these students after class. 10. I can start work tomorrow morning. 11. He can only get there in the evening. 12. Will you be able to translate these articles tomorrow? 13. Will he be able to meet these engineers at five o'clock? 14. She will not be able to finish this work tomorrow. 15. He will not be able to read these books on time. He does not have time. Надеюсь верно перевёл