单项选择题

It is thus of exceptional importance ______ extinction theories, but until now problems with dating have limited its potential.

A．for a testing purpose on
B．as a testing reason in
C．as a testing ground for
D．for some useful ends of
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单项选择题
Nonetheless, multi-regionalists ______ folding their tents and if anything, may have grown even more convinced of their position.
A．show signs to
B．take no signs of
C．show no signs of
D．take note of
单项选择题
Despite the end of the Cold War, defense and civil industrial interests in small science are______.
A．as stronger as before
B．as powerful as is expected
C．as strong as ever
D．as more powerful as expected
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