阅读下面的短文,文章中有5处空白,文章后面有6组文字,请根据文章的内容选择5组文字,将其分别放回文章原有位置,以恢复文章原貌。 Conservation or Wasted Effort
The black robin (旅鸫) is one of the world’s rarest birds. It is a small,
wild bird, and it lives only on the island of Little Mangere, off the coast of
New Zealand. In 1967 there were about fifty black robins there; in 1977 there
were fewer than ten. (46) Energetic steps
are being taken to preserve the black robin. (47) The idea is
to buy another island nearby as a special home, a “reserve”, for threatened wild
life, including black robins. The organizers say that Little Mangere should then
be restocked (重新准备) with the robin’s food. Thousands of the required plants are
at present being cultivated in New Zealand. Is all this concern
a waste of human effort (48) Are we losing our sense of what
is reasonable and what is unreasonable In the earth’s long,
long past hundreds of kinds of creatures have evolved, risen to a degree of
success and died out. In the long, long future there will be many new and
different forms of life. Those creatures that adapt themselves successfully to
what the earth offers will survive for a long time. (49) This
is nature’s proven method of operation. The rule of
selection—“the survival of the fittest”—is the one by which human beings have
themselves arrived on the scene. We, being one of the most adaptable creatures
the earth has yet produced, may last longer than most, (50)
You may take it as another rule that when, at last, human beings show
signs of dying out, no other creature will extend a paw (爪) to postpone our
departure. On the contrary, we will be hurried out. Life seems
to have grown too tough for black robins. I leave you to judge whether we should
try to do anything about it. A. Some creatures, certain small
animals, insects and birds, will almost certainly outlast (比……长久)man, for they
seem even more adaptable. B. Those that fail to meet the
challenges will disappear early. C. Detailed studies are going
on, and a public appeal for money has been made. D. Both
represent orders in the classification of life. E. Is it any
business of ours whether the black robin survives or dies out
F. These are the only black robins left in the world.