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Grammar

Present continuous passive and present perfect passive

1. The remains of a giant sea monster are being taken have been discovered have been closed have been seen are being found have been installed have been lost are still being hunted are being cut down are being sought on a beach in the South of England
2. The world's rain forests are being taken have been discovered have been closed have been seen are being found have been installed have been lost are still being hunted are being cut down are being sought at the rate of 60 hectares a minute.
3. Polar bears are being taken have been discovered have been closed have been seen are being found have been installed have been lost are still being hunted are being cut down are being sought in several Canadian cities over the last decade.
4. Whales are being taken have been discovered have been closed have been seen are being found have been installed have been lost are still being hunted are being cut down are being sought by some nations, although most of the world opposes it.
5. Several rare species are being taken have been discovered have been closed have been seen are being found have been installed have been lost are still being hunted are being cut down are being sought forever in the name of human progress.
6. Energy-saving light bulbs are being taken have been discovered have been closed have been seen are being found have been installed have been lost are still being hunted are being cut down are being sought in most public buildings.
7. Some factories are being taken have been discovered have been closed have been seen are being found have been installed have been lost are still being hunted are being cut down are being sought recently because they were polluting too much.
8. Some rare species are being taken have been discovered have been closed have been seen are being found have been installed have been lost are still being hunted are being cut down are being sought from zoos back into their natural habits.
9. In spite of habitat destruction, new species are being taken have been discovered have been closed have been seen are being found have been installed have been lost are still being hunted are being cut down are being sought every year.
10. Cleaner sources of energy are being taken have been discovered have been closed have been seen are being found have been installed have been lost are still being hunted are being cut down are being sought all the time.