Although James Cook   the first westerner to have discovered Australia,New Zealand and Hawaii,his travels led to the creation of more accurate and reliable maps for vast parts of the world.
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A
isn’t
B
wasn’t
C
must have been
D
may not have been
推荐题目
He insisted what he did _______ right and that anyone who broke laws ________.
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A
was ; be punished
B
be ; was punished
C
was; was punished
D
be ; be punished
Should the present unemployment continue, the society________a more troublesome situation.
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A
would have faced
B
would face
C
is facing
D
has faced
.The manager demanded the meeting _________.
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A
be called off
B
was called off
C
to be called off
D
should call off