Jenny is always absent from school, ______ I suppose is why she is criticized now and then.
#78659
A
which
B
who
C
that
D
what
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I have bought two ball pens, _____ writes well.
#78692
A
none of them
B
neither of them
C
none of which
D
neither of which
At present, we are studying a total of nine subjects, ________ I think is physics.
#78645
A
of them the most difficult
B
and the most difficult of which
C
the most difficult of them
D
the most difficult of which