, I would have told you．A.If I knew itB.Had I known itC.If I know itD.Did I know
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________, I would have told you．
A.If I knew it
B.Had I known it
C.If I know it
D.Did I know it
试题答案
B
________, I would have told you．
A.If I knew it
B.Had I known it
C.If I know it
D.Did I know it
B