单选题：Government cannot operate effectively （　　）it is free from su

题目内容：

Government cannot operate effectively （　　）it is free from such interference. A．so long as
B．so that
C．unless
D．because

参考答案：

答案解析：

（　　）in a seemingly endless war, the general was forced to ev

（　　）in a seemingly endless war, the general was forced to evaluate the situation

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