考研考试

【单选题】It is naive to expect that any society can resolve all the social problems it is faced with______.
A． for long
B． in and out
C．once for all
D． by nature
网考网参考答案：C
网考网解析：
once for all是“一劳永逸”。A．for long是“长久”；B．in and out是“里外”；D．by nature是“本质上”。 查看试题解析出处>>