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earlier, I' d have told you. A. If I would have known it B. Had I known it C. If

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earlier, I' d have told you. A. If I would have known it B. Had I known it C. If

______earlier, I' d have told you.

A. If I would have known it       B. Had I known it

C. If I knew it.                 D. Should I know it

试题答案

B