There is a system ________the waste is disposed of using the principles of ecology.
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A
which
B
where
C
that
D
at which
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Ellen was a painter of birds and of nature, _____, for some reason, had withdrawn from all human society.
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A
which
B
who
C
where
D
whom
We’re living in a society_______exchanging presents is an important part in communication.
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A
which
B
when
C
why
D
where
We’re talking about the piano and the pianist __________ were in the concert we attended last night.
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A
which
B
whom
C
who
D
that
The schools themselves admit that not all children will successful in the jobs ______ they are being trained.
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A
in that
B
for that
C
in which
D
for which