Read the passage and fill the suitable word in the blank: (5points) We are destroying the Earth. The seas and rivers are too dirty to swim in. There is too (1)___________smoke in the air in many cities in the world. We are cutting (2)________ too many trees. We are burning the forests. We are also destroying (3)__________of plants and animals. Many areas on Earth are wasteland. Farmers in many parts of the world cannot (4)___________enough to eat. In some countries, there is too little rice. The Earth is in(5)__________. Save the Earth!

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