单项选择题

Discovering consists of seeing what everybody has seen and ______ what nobody has thought.

A．think
B．thinking
C．thought
D．to think
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单项选择题
This is Mr. White, ______ I think has something interesting to tell you.
A．which
B．whom
C．that
D．who
单项选择题
After the new technology was brought in, this year's production of the cars in our factory is five times ______ it was five years ago.
A．more
B．than
C．what
D．as
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