is not only what you do, but also how you do it that makes the difference.
A. There
B. This
C. That
D. It
网友回答
A. There
B. This
C. That
(答案→)D. It
解析：考查的是强调句型。It is+被强调的部分+that，题中强调的是not only what you do, but also how you do it ，填上it,句意:就是不仅你做什么，而且你怎样做会有所不同。