单项选择题

The preservation of embryos and juveniles is a ______ occurrence in the fossil re-cord.

A．scarce
B．lack
C．rare
D．short
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______ can be judged from her eyes, she has no personal hostility to us.
A．It
B．As
C．Which
D．That
单项选择题
I did not choose any of the three ways, because I found ______ satisfactory.
A．neither of them
B．either of them
C．none of them
D．none of it
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