问题补充：
is it has made Peter he is today?
A. What; that; that
B. That; that; what
C. What; what; that
D. What; that; what
答案：
A. What; that; that
B. That; that; what
C. What; what; that
(答案→)D. What; that; what
解析：首项填入what，即强调句型中被强调的部分，第二项填入that构成强调句型；Is it…that…？第三项填入what引起一个名词性从句作Peter的补足语。
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