15. Nelson's success has nothing to do with good luck. It is years of hard work that has made him __ today.
(A) what he does
(B) the person that he is
(C) what he has
(D) what he had been
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統計: A(0), B(1), C(0), D(0), E(0) #3367321
統計: A(0), B(1), C(0), D(0), E(0) #3367321