1. He (studied) better than his father (had done). 2. They (spent) their vacation last year at the same village where they (had lived) many years before. 3. When we ( came) she had already ( sent) the children away and (was free) to speak to us. 4. Yesterday I (bought) a new watch as I (had lost) my old one. 5. He (took) the boy to the door by which he himself (had entered) the room. 6. He ( opened) his eyes, then ( looked) around and (thoght) for some time, trying to remember what (had happened) to him. 7. After they (had travelled) in the Caucasus they (decided) to make a sea voyage. 8. After they (had gone) at last I (went) to bed. 9. He (ate) all the cakes after we (had told) him not to do it. 10. The day after the party he ( asked) why we (had left) so early.
1) Living conditions for the life brigade members are not very comfortable here. 2) The plants died through lack of water. 3) If people burn poisonous waste, they can produce dangerous gases. 4) Some part of waste can be useful if you know how to recycle it. 5) Acid rain can poison rivers and lakes, it can destroy metal things and buildings too. 6) Toxic waters can poison fish. 7) Nowadays people spill a lot of oil into the sea. 8) If you do it, oil remains on top of the water and sea plants and animals have shortage. 9) Nuclear power stations use uranium to produce electricity. 10) Evidently, a lot should be done to solve the ecological problems we are facing these days. 11) California has a large Spanish-speaking population.
2. is