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
Over ______ of the employees in this company were men.
A．nine tenth
B．nine-tenth
C．nine-tenths
D．nine-tenthes
单项选择题
The success of the project stands ______ management's support of it.
A．down
B．by
C．for
D．on
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