This is the small house less than 15 square meters, under _________ roof lives a large family of three generations.
#78337
A
which
B
that
C
its
D
whose
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The old man has a son and two daughters, ______ treat him well, _______ made him very sad.
#77450
A
and none of whom; as
B
neither of them; which
C
and none of whom; what
D
none of whom; which
The pen ________ he is writing is mine. 
#75605
A
with which
B
in which
C
on which
D
by which