每日一练：职称英语考试卫生类每日一练(2019/6/19)
【单选题】
Theblack robin （旅鸫） is one of the world's rarest birds. Itis a small， wild bird， and itlives only on the island of Little Mangere， off thecoast of New Zealand. In 1967 there were about fifty black robins there； in 1977 there were fewer than ten._____1_____
Energeticsteps are being taken to preserve the black robin._____2_____ The idea is tobuy another island nearby as a special home， a"reserve"， for threatened wild life， including black robins. The organizers say that Little Mangereshould then be restocked （重新准备） with the robin's food.Thousands of the required plants are at present being cultivated in NewZealand.
Isall this concern a waste of human effort？ _____3_____Are we losing our sense of what is reasonable and what is unreasonable？
Inthe earth's long， long past hundreds of kinds ofcreatures have evolved， risen to a degree of successand died out. In the long， long future there will bemany new and different forms of life. Those creatures that adapt themselvessuccessfully to what the earth offers will survive for a long time._____4_____This is nature's proven method of operation.
Therule of selection——"the survival of thefittest"——is the one by which human beings havethemselves arrived on the scene. We， being one of themost adaptable creatures the earth has yet produced， may last longer than most._____5_____ You may take it as another rule that when， at last， human beings show signs of dyingout， no other creature will extend a paw （爪） to postpone our departure. On the contrary， we will be hurried out.
Lifeseems to have grown too tough for black robins. I leave you to judge whether weshould try to do anything about it.
ASome creatures，certain small animals，insects and birds，will almost certainlyoutlast man，for they seem even more adaptable. B Thosethat fail to meet the challenges will disappear early.
CDetailed studies are going on，and a public appeal formoney has been made.
DBoth represent orders in the classification of life
EIs it any business of ours whether the black robin survives or dies out？
FThese are the only black robins left in the world
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