单项选择题

He made another wonderful discovery, _____ of great importance to science.

A．which I think is
B．which I think it is
C．which I think it
D．I think is
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单项选择题
-- “I don`t drink coffee at all.”-- “_____.”
A．So don`t I
B．I do either
C．Nor I do
D．Neither do I
单项选择题
We consider _____ the machine should be adjusted each time it is used .
A．that it necessary
B．necessary it that
C．it that necessary
D．it necessary that
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