In the past few years, My Heart Will Go On was a popular song among young people, ____ were often heard singing it at parties．
#78654
A
they
B
that
C
who
D
which
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She wore , _____ was very uncommon in the country, a red garment.
#78675
A
what
B
which
C
of which
D
as
A huge amount of oil was spilt on the East Sea, the causes of ______ are still under investigation.
#78658
A
it
B
that
C
which
D
whom
Sara treats her youngest son much better,_____ makes other children envy badly .
#78726
A
that
B
it
C
she
D
which
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