单项选择题

No case is on record of a ______ being ceasing to be ______ under cultivation.

A．variable, variant
B．variant, variable
C．varied, various
D．variable, variable
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单项选择题
We're separating ______.
A．to keep
B．for keep
C．for keeps
D．to keeps
单项选择题
He kept the news ______ himself without telling anyone about it.
A．to
B．with
C．from
D．in
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