Complete the sentences with the boldfaced words from the text.
1. Clean water is xxx in some African countries.
2. Plants don't grow in this XXX.
3. New laws are aimed at reducing car XXX.
4. The fumes from this chemical are very XXX.
5. All animals should live in their natural xxx.​

1. He (did not  waste) time with foolish questions like why, when and where. He did as he was told.
2. Always a punctual woman, she (comes) downstairs as the front door (is being opened) for Charles.
3. Some kind of public demonstration (is being planned) to take place at the airport tonight.
4. The flight (had not been announced) yet. It (would not be announced) for another half-hour, at least.
5. The message, as Tanya (was dictating) it, (was being typed) by a girl clerk in New York.
6. She could tell by the inclination of his head that he (had been listening) intently to everything that (had been said).
7. It (is) an old house that (is divided) into flats.
8. Julia can’t know what (is being said) about her, and someone must tell her.
9. Each apartment was usually ( shared) by two or three girls. They (were known) as stewardess’ nests.
10. Inez (occupied) a chair in the room’s centre to which she (had been/was guided) on arrival.
11. He ( saw) that the doors of Trans America Flight Two (had not been closed) yet, and a few remaining passengers were still ( checking) in.

1. Have You (found) the money which you (lost) yesterday? — Yes, I (found) it in the pocket of my coat when I (came) home. 2. The rain (has stopped) but a strong wind is still blowing. 3. We (have never seen) him. We don't even know what he looks like. 4. She (met) them in the Globus theatre last afternoon. 5. How long have you (known) him? — We (met) in 1996, but we (haven't seen) each other since last autumn. 6. He ( has been living) in St. Petersburg for two years. 7. When did he (arrive)? — He (arrived) at 2 o'clock. 8. I can't go with you because I (haven't finished) my lessons yet. 9. He (left) for Canada two years ago and I (haven't seen) him since. 10. Has he (done) everything already? — Yes, he (did) his part of work long ago. 11. When did you (meet) him last? 12. Have you ever (been) to Japan? — Yes, I (was) there the year when there was an earthquake. 13. The discussion has already (begun). Why are you always late? 14. They (haven't met) since they (left) school. 15. The rain (has stopped). Come out, I want to speak with you.