The output of production of our factory is two times as ________ it was three ye

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问题 The output of production of our factory is two times as ________ it was three years ago.

选项 A、what
B、that
C、as
D、which

答案 A

解析 what引导名词性.从句，相当于the output that…。故A选项为正确答案。C选项as不能和as直接连用，故排除。又因题干中无先行词，故不能直接用B选项和D选项作为连接词。

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