Trắc nghiệm Ngữ pháp tiếng Anh B1 Online

Man’s rise to a position as the dominant creature on this earth has been closely involved with his mammalian cousins. Even in highly industrialized nations, mammals provide food, drink, clothing, transportation, and power. It’s interesting, however, that man’s interdependency is limited to a few dozen domesticated species. The other mammals are either in the category of “enemies” or of little interest at all.

Man has waged a war against his mammalian enemies with little result. Despite trapping, shooting, poisoning, gassing, and a dozen other ploys, most of our enemies are still with us. The victims of man’s dominance have been rather the ones in which we have little interest. In fact, the majority of the animals that have become extinct during man’s march to global dominance have been just these uninteresting creatures.

For all of man’s success, he is still a newcomer. It is only in the past century that we have been able to cross water better than a porpoise or to dive as deeply as whale. It is only recently that we have been able to travel on land faster than a cheetah or fly faster than a bird. With this new power, man has a responsibility to his cousins, because he is interdependent, even with the mammals for which he cares little.