单项选择题

A．determined
B．directed
C．planned
D．described
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单项选择题
A．withB．throughoutC．withoutD．for
A．with
B．throughout
C．without
D．for
单项选择题
A．had testedB．had to testC．have testedD．have been testing
A．had tested
B．had to test
C．have tested
D．have been testing
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