It was I went there I began to know something about the matter.A. until；whenB. until；thatC

问题补充：

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

答案：

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。