The black robin (知更鸟）is one of the world's rarest birds. It is a small, wild bird and it lives only on the island of Little Mange-re, off the coast of New Zealand. In  1967 there were about fifty black robins there ； in  1977 there were fewer than ten. These are the only black/robins left in the world. The island has many other birds, of course, of different kinds, large and small, and they seem to multiply (繁殖）very happily.
Energetic steps are being taken to preserve the black robin—to guard those appeal for money has been made. The idea is to buy another island nearby as a special home, a "reserve"，for threatened wildlife, including black robins. The organizers say that Little Man-gere should then be restocked (再储存）with the robin's food—it eats only one kind of seed—and so renewed for it. Thousands of the required plants are at present being cultivated (耕种）in New Zealand. The public appeal is aimed at improving the conscience of mankind, so that the wild black robin will not die out and disappear from the earth in our time at least.
In the earth's long, long past, hundreds of kinds of creature have evolved (进化），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. Those that fail to meet the challenges will disappear early. That is Nature's proven method of operation.
The rule of selection " the survival of the fittest" is the one by which man has himself arrived on the scene.
Life seems to have grown too tough for black robins.
The black robin is dying out mainly because __________.

A．people have been very careless about its survival

B．its only food is becoming exhausted(耗尽)on Little Mangere

C．the other birds on the island have destroyed it

D．the appeal for money has come at the wrong time

The writer's attitude towards the protection of the black robins is __________

A．active	B．passive
C．indifferent	D．pessimistic

The success of other small birds on Little Mangere shows that __________.

A．the island cannot have very much food left

B．something has to die out, and they can't all be winners

C．the big birds have all been attacking the black robin

D．the robin has failed to meet the challenges of life

As regard selection and survival, the decisive factor seems to be __________

A．the ability to adapt to changed or changing conditions

B．the number of wildlife reserves that are available

C．the concern and generosity of the public

D．the size of the home, or the amount of space one has to live in

The evidence seems to suggest that __________

A．it is a disaster for everyone when one kind of bird dies out

B．all creatures are concerned about the survival of others

C．nature expects and accepts the dying out of weaker breeds

D．man is to blame when such a thing happens