He made another wonderful discovery, _______ of great importance to science.
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A
which I think
B
which I think it
C
which I think is
D
I think which is
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_______ President Xi has pointed out, we chinese should have our chinese dreams.
#76930
A
Which
B
That
C
As
D
It
Dorothy was always speaking highly of her role in the play, ___ , of course, made the others unhappy.
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A
who
B
which
C
this
D
what
________ is know to us all is that the old worker, for _______ life was hard in the past, still works hard in his seventies.
#78272
A
As; whom
B
What; whose
C
It; whose
D
What; whom
There is a system ________the waste is disposed of using the principles of ecology.
#76233
A
which
B
where
C
that
D
at which