单项选择题


A．forbids
B．discourages
C．prevents
D．allows
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单项选择题
A．ThereforeB．ThenC．ConsequentlyD．Nevertheless
A．Therefore
B．Then
C．Consequently
D．Nevertheless
单项选择题
PO to be understood B) understanding C) to understand D) being understood
A．PO to be understood B) understanding
B．to understand
C．being understood
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