---Whatever your parents______ you
---there is real Santa Claus. And I should know, because I’ve seen him myself !A.may tellB.could tellC.may have toldD.must have told
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C解析句意:不管你们的父母曾经是怎么告诉你们的——总之,真的是以圣诞老人。我当然知道,因为我曾亲肯见到过他。表示对过去可能性进行推测。而非肯定推测,故用may have done结构。