The students have spent much time in the laboratory.
Moscow has just left the scientist for Great Britain.
He has already finished his laboratory work.
We have never been there.
She has not graduated fron the institute yet.
1. He usually walks home after work. 2. Where does Comrade Petrov work? 3. He does not work hard at his German. 4. Do you often speak in class? 5. Who is answering questions now? 6. Does your sister often stay at the office after work for her English? 7. I do not often get telegrams from my friends. I often get letters from them. 8. Who often discusses plans with these engineers? 9. What are they discussing now? 10. Are you going to discuss this question tomorrow morning? 11. How well do they know English? 12. Do the students revise the words at home or in class? They do it at home. 13. Are they revising the words now? 14. What does he do? He is a factory worker. 15. What is he doing?He is translating an article now
7. environmental
8. pollution
9. recycled
10. natural
11. container
12. protection
1)b,2)c,3d,,4d,5a,6c,7,b,8 a,9c,10 b,11 c,12a,13c,14a,15,16b,17b,18c,19d це правильно