____(41)
A.dated
B.originated
C.introduced
D.burst

______(43)
A.with
B.either
C.and
D.but

______(45)
A.because
B.if only
C.as
D.although

According to the first paragraph _______.
A.species extinction is only caused by hunting
B.human beings protect wild life much more than they do harm to them
C.the main cause of species extinction is human activities
D.we can stop radically species extinction by 2025

The North American bison _______.
A.was completely extinct in 1800s
B.was not the aim of human hunting
C.was raised by settlers in 1800s
D.has escaped from extinction thanks to conservationists

Which sentence is true?
A.Medicine is not a factor to cause species extinction.
B.The list which conservationists present does not include all kinds of species.
C.Pollution does nothing to species extinction.
D.Conservationists have good knowledge of all kinds of mollusks.

A.school
B.chemistry
C.character
D.machine

A.initiate
B.integral
C.scientific
D.interesting

There is no one that wants to fail in the GCSE examination, _______?
A.isn’t it
B.don’t they
C.is there
D.does he

The refuse collectors often work at night or even at midnight because they take_______ for keeping the city clean and beautiful. (refuse collector: dustman)
A.possibility
B.ability
C.responsibility
D.probability