单项选择题

The _________ cycle of life and death is a subject of interest to scientists and philosophers alike.

A．incompatible
B．exceeding
C．instantaneous
D．eternal
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单项选择题
He will surely finish the job on time _________ he's left to do it in his own way.
A．in that
B．so long as
C．in case
D．as far as
单项选择题
If this kind of fish becomes _________, future generations may never taste it at all.
A．minimum
B．short
C．seldom
D．scarce
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