The company ran into trouble when it tried to expand too quickly, _____ was that it was short of money.
#78668
A
some of them
B
most of which
C
one of them
D
part of which
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The astronaut did many experiments in the spaceship, ______ much help for knowing space. 
#78666
A
which we think it is
B
which we think are of
C
of which we think are
D
I think which is of
The old farmer has two daughters, _______ is kind to him, _______makes him very sad.
#78691
A
neither of whom; which
B
neither of them; which
C
both of whom; which
D
both of whom; that