not until 的强调句问题

题目

not until 的强调句问题
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

CIt was not until I went there that I began to know something about the matter.直到我到那里我才了解那件事.这个是强调句,强调句的形式是it was ...that...所以第二个空用that.前面的意思是直到...才..,所以用n...