The new buyer identified a dozen new sources for the material, ___________ proved to be reliable.
#75889
A
most of them
B
most of which
C
most of whom
D
most of those
Can you imagine the trouble that they had ___ the orphan in the terrible years? 
#75892
A
bring up
B
to bring up
C
bringing up
D
brought up
With more and more forests disappearing, today the public is much concerned about the way _________.
#75896
A
nature is being ruined
B
which nature is ruined
C
on which to ruin nature
D
of nature to be ruined
Last month 3 people got injured in a gas explosion,        has not been discovered yet.
#75905
A
whose cause
B
the cause of that
C
which cause
D
the cause
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