We are now facing the possible________ of several rare species.
A.danger
B.variety
C.existence
D.disappearance

Would you like lunch with us?' `Yes, I'd love to.'
A.have
B.to have
C.having
D.had

A.eliminate
B.elephant
C.endanger
D.erosion

A.pollute
B.species
C.accept
D.receipt

A.environment
B.hydroelectric
C.circulation
D.wild

A.club
B.lamb
C.doubt
D.bomber

A.disappearance
B.circulation
C.conservation
D.environment

A.nature
B.power
C.damage
D.defence

A.injured
B.valuable
C.forest
D.protect

One’s fingerprints are_____ other person.
A.different from
B.different from any
C.differ from any
D.different from those of any