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

John: “Wearing this dress makes you prettier, Jennifer!” --Jennifer: “_____________________”
A.It’s all right.
B.Don’t mention it.
C.Thank you.
D.Congratulations!

If only you ______how hard I've tried to please you.
A.know
B.knew
C.will know
D.would know

The house was in such a mess - it looked as though a bomb ______on it.

A.dropped
B.has dropped
C.was dropped
D.had dropped

If I had gone to the party last night, I ______tired now.
A.am
B.were
C.would be
D.would have been