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

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：考查强调结构。强调句结构为it is / was + 强调结构 + that从句，本题强调状语after he got what he had wanted，选A。