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One of a kind, unlike anything else.
unique (a)
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Students … study hard get good grades.
who
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Do you know the reason … there are no penguins at the North Pole?
why
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My grandfather remembers the time... there was no television.
khen
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I know a great little restaurant … we can get lunch.
where
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A place for scientific research or experiments.
Laboratory (n)
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Exactly the same
Identical (a)
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A set of related things or events
Series
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Food … is imported from other countries is expensive.
which/ that
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The movie … we saw last week won three awards.
which
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A small device or tool.
Gadget (n)
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Can you find the teacher … you talked to this morning?
whom
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Made by human, not natural.
Artificial (a)
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Difficult to understand or deal with.
Complicated (a)
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An approximate calculation or judgment.
Estimate (v)
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Sam knows a man … brother works for the president.
whom
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