单项选择题


A．exploit
B．explore
C．extend
D．expand
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单项选择题
A．noneB．nothingC．anything butD．nothing but
A．none
B．nothing
C．anything but
D．nothing but
单项选择题
A．in the event ofB．with the exception ofC．at the expense ofD．as a result of
A．in the event of
B．with the exception of
C．at the expense of
D．as a result of
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