the cattle drank from a river polluted with toxic chemical.
many people come to the national park to see the work being done to protect endangered species.
plants or animals that many be dangerous to people.
plants or animals that dangerous from the world.
plants or animals that are about to die.
plants or animals that many soon become extinct.
at what time will the meeting be over.
begun , started , lasted , ended .
contamination is threatening the park and many species of animals living in it.
population , pollution , elimination , distribution .
cuc phuong national park contains over 200 square kilometers of rainforest.
forest which has only wild flowers.
thin forest which has no rain.
thick forest in a tropical part that has a lot of rain.
thick forest in a temperate zone that has a lot of rain
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