问题
选择题
. John's success has nothing to do with good luck. It is years of hard work __________has made him what he is today.
A．why
B．when
C．which
D．that
答案
答案：D
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. John's success has nothing to do with good luck. It is years of hard work __________has made him what he is today.
A．why
B．when
C．which
D．that
答案：D