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An animal species becomes extinct when it fails to produce enough young in each generation to keep pace with the death-rate. We can (26) from fossil evidence in rocks that many living species have become extinct over the millions of years (27) life began. It is a natural (28) and extinction is the (29) of any animal that has specialized too far to change (30) its environment changes, or has to compete with a better- (31) and more powerful animal. (32) remarkable technical developments during the past few centuries, man has destroyed or (33) destroyed some species by killing them (34) such a rate that they couldn’t produce enough offspring, or by completely changing their natural environment at surprising speed.
A number of examples can be given of the way (35) which natural environments are being rapidly changed—Amazonia, for instance. There is every (36) that m
A. at
B. over
C. to
D. for

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An animal species becomes extinct when it fails to produce enough young in each generation to keep pace with the death-rate. We can (26) from fossil evidence in rocks that many living species have become extinct over the millions of years (27) life began. It is a natural (28) and extinction is the (29) of any animal that has specialized too far to change (30) its environment changes, or has to compete with a better- (31) and more powerful animal. (32) remarkable technical developments during the past few centuries, man has destroyed or (33) destroyed some species by killing them (34) such a rate that they couldn’t produce enough offspring, or by completely changing their natural environment at surprising speed.
A number of examples can be given of the way (35) which natural environments are being rapidly changed—Amazonia, for instance. There is every (36) that m
A. tell
B. secure
C. draw
D. separate

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