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By nine o’clock, all the Olympic torch bearers had reached the top of Mount Qomolangma, ____ appeared a rare rainbow soon.
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A
of which
B
on which
C
from which
D
above which
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I have no doubt in my mind______ they will be glad to see me.
#69300
A
if
B
whether
C
that
D
about
 Is this factory _____ you visited the other day？
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A
the one
B
that
C
where
D
when
Many factors influence a student in his/her study, ____ I think are out of a teacher’s control.  
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A
most of them
B
most of which
C
most of what
D
most of that
We must accept the possibility ________ one, although working hard, may fail to reach his goal.
#68200
A
whether
B
what
C
that
D
how
        that they may eventually reduce the amount of labor needed on construction sites by 90 percent．
#69828
A
Such construction robots are clever
B
So clever the construction robots are
C
Such clever construction robots are
D
So clever are the construction robots