单项选择题

In the U. S. , it is common that each state ______ its power to an elected or appointed state board of education.

A．exercises
B．applies
C．adjusts
D．delegates
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单项选择题
A．thereB．overC．outD．in
A．there
B．over
C．out
D．in
单项选择题
A．onB．inC．offD．for
A．on
B．in
C．off
D．for
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