It was I went there I began to know something about the matter.
A. until；when
B. until；that
C. not until；that
D. not when；that
网友回答
A. until；when
B. until；that
(答案→)C. not until；that
D. not when；that
解析：考查强调句的特殊结构：It was not until…that….，“直到…才…”，句意：直到我到了那里才知道这件事情的一些情况。选C。