It was after he got what he had wanted he realized it was not so important .A. that B. whe

问题补充：

It was after he got what he had wanted he realized it was not so important .

A. that

B. when

C. since

D. as

答案：

(答案→)A. that

B. when

C. since

D. as

解析：考查强调句型。强调句型的基本结构为：It is/was被强调成分that/who其它成分；强调句型最大的特点是去掉it is/was…that/who…句子仍然成立。本句强调的是after he got what he had wanted.句意：就是在得到了他想要的以后，他才意识到这并不重要。故A正确。