问题补充:
It was several years I realized David had lied to me.
A. when; that
B. that; when
C. before; that
D. until; why
答案:
A. when; that
B. that; when
(答案→)C. before; that
D. until; why
解析:C句意:过了几年我才意识到大卫向我撒了谎。It is/was+一段时间+before...表示“过了多长时间才……”;第二空,realized后的从句不缺成分,故用that引导。