It was the fist time he had seen a dolphin.
A.He has seen a dolphin before.
B.This is a big dolphin I have seen before.
C.He had seen a dolphin before.
D.He had never seen a dolphin before.

He has become famous when he was awarded the prize.
A.famous
B.when
C.was awarded
D.prize

Choose the best answer to complete the following questions
If you’re afraid............... what might happen if we don’t change our ways, then we want to hear from you!
A.of
B.at
C.about
D.on

Because of it was very noisy, I couldn’t know you called.
A.Because of
B.was
C.know
D.called

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A beautiful golden eagle was sitting..............the top of the tree.
A.at
B.in
C.on
D.under

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................total, there are over eighty different types of animal in the zoo.
A.in
B.on
C.to
D.at

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I’ll just put this box.............. and then I’ll help you with the tent.
A.up
B.on
C.down
D.away

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Air.................. isn’t really a serious problem where we live.
A.pollution
B.polluted
C.polluting
D.pollute

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Lots of .................. things are poisonous to humans.
A.nature
B.natural
C.naturally
D.natured

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Scientists aren’t sure of the................ of the moon, but they think that maybe it was one part of the Earth.
A.origin
B.environment
C.satellite
D.planet