The policy ______ made, the next problem was how to carry it out.A、having beenB

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问题 The policy ______ made, the next problem was how to carry it out.

选项 A、having been
B、being
C、had been
D、was

答案 A

解析这是一个独立主格结构，用-ing分词的完成式表示该动作先于主句的动作完成。

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