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
I got a note from Moira urging me to get in touch.
A．instructing
B．pushing.
C．notifying
D．inviting
单项选择题
The sea turtle’s natural habitat has been considerably reduced.
A．suddenly
B．generally
C．slightly
D．greatly
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