John's success has nothing to do with good luck. It is years of hard work

问题补充：

单项选择题:

Johns 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

解析： It is…that是强调句型，强调句子的主语years of hard work。