If you can dream , you can do .A. one; it B. it; one C. one; one D. it; it

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A. one; it
B. it; one
C. one; one
(答案→)D. it; it
解析：If you can dream it, you can do it意思是如果你能想到你就能做到，it和one作代词时，one指代前已提到过的可数名词的单数形式，复数用ones，而it即可指代可数名词也可指代不可数名词。