A Some creatures，certain small animals，insects and birds，will almost certainly outlast 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
参考答案：F C E B A
