Lawrence Craven, a doctor from the USA, is the author of several published reports, one of which introduced the idea in 1953 ________ aspirin could reduce the risk of heart attacks by thinning blood.
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A
when
B
where
C
that
D
which
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It is the years we spent together at college ________ have a deep effect on my life.
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A
which
B
that
C
when
D
where
Can you make sure ______the gold ring?
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A
where Alice had put
B
where had Alice put
C
where Alice has put
D
where has Alice put
. _____is known to us all, America is a developed country____ the first world.
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A
As; belonging
B
which; belonged
C
as; belonging to
D
which; belonged to