单项选择题

He asserted that nuclear power was a safe and non-polluting energy source.

A．maintained
B．recommended
C．considered
D．acknowledged
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单项选择题
At that time, we did not fully grasp the significance of what had happened.
A．give
B．attach
C．lose
D．understand
单项选择题
Anderson left the table，remarking that he had some work to do .()

A．doubting
B．saying
C．thinking
D．knowing
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