单项选择题

External dangers usually enforce ______ harmony and subordination.

A．inside
B．inner
C．internal
D．interior
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单项选择题
The success of the project stands ______ management's support of it.
A．down
B．by
C．for
D．on
单项选择题
After 9. 11, educators in America are thinking about how to help children become ______.
A．flexible
B．resilient
C．elastic
D．yielding
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