Find the odd word: 1. rock, mountains, hill, grassland, peak2. river, sea, lake, ocean, shore3. hunt, remember, fight, hope, discover4. voyage, trip, tour, travel, journeyfind the odd word: 1. sailor, doctor, teacher, visitor, engineer2. nearly, lovely, slowly, quietly, loudly3. round, square, oval, line, triangular4. wigwam, skyscraper, museums, house, castle​

1) Peter was Sally's best friend. She (had known) him all her life.
2) The children were wet because they (had been playing) football in the rain
3) We were very hungry because we(had not / eaten).
4) I was delighted when I found my keys. I(had been looking) for them for hours.
5) She was exhausted because she(had been working) since eight o'clock that morning.
6) Everything was white because it(had been snowing).
7) The passengers were angry because the airline (had lost) everyone's bags.
8) I (had not / seen) Jacob for several years, but I recognised him immediately.

The poisoning of the world's land, air, and water is the fastest-spreading disease of civilisation. it probably produces fewer headlines than wars, earthquakes and floods, but it is potentially one of history's greatest dangers to human life on earth. if present trends continue for the next several decades, our planet will become uninhabitable.overpopulation, pollution and energy consumption have created such planet-wide problems as massive deforestation, ozone depletion, acid rains and the global warming that is believed to be coused by the greenhouse effect.the seas are in danger. they are filled with poison: industrial and nuclear waste, chemical fertilisers and pesticides. the mediterranean is already nearly dead; the north sea is following. the aral sea is on the brink of extinction. if nothing is done about it, one day nothing will be able to live in the seas.