The old man had one son and two daughters,     treated him well,     made him very sad.
#76918
A
neither of whom; that
B
neither of them; which
C
none of whom; which
D
none of them; which
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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
Please never do such things _______ other people. 
#77068
A
that will do harm to
B
as they will do harm to
C
as will do harm to
D
which are harmful to
Without facts, a person can not form a correct opinion, for he needs to have actual knowledge ______his thinking .
#76203
A
on which to be based
B
on which to base
C
which to be based
D
which to base