Dinosaurs lived on the earth tens of millions of years ago, long before human being came into existence. Unfortunately, they died out because of an(expect) incident. But wildlife today disappears or is in danger just because humans do harmit. For example, tigers are hunted for fur to make carpets, so that they only live in secure reserves; grassland (destroy) without mercy, so that dust storms come into being affecting distant cities. Last year, scientists saw some monkeys rubbing themselves with a certain kind of insects(prevent) themselves from being bitten by fierce mosquitoes. According to the result of the inspection, they found that the insect containspowerful drug. As a result, local farmers were employed to catch the insects, led to their disappearance from the whole zone. When told that it was a loss to humans, the farmers burst into laughter and responded, "Our real loss is our(decrease) income." Therefore, we human beings should appreciate the natural balance and pay (much) attention to the importance of wildlife(protect) than before. Not until we succeed in letting wildlife live(peace), can we smile in relief.
微信扫码预览、分享更方便
