The band was very successful in the seventies, most of ________ members were in their twenties.
#67107
A
its
B
whose
C
whom
D
which
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Some researchers believe that there is no doubt ______ a cure for AIDS will be found.
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A
which
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that
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D
whether
At the party, John made up a joke, people burst out laughing.
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A
on which
B
by which
C
at which
D
from which
It is not always easy for the public to see _______ benefit a new invention can be of to human life.
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A
whose
B
what
C
which
D
that