______many years later_______the whole truth become known.

问题描述:

______many years later_______the whole truth become known.
A It was,that B Not until,did
C It was,before D Until,did
答案是B请问这种题目怎么看?
那用A强调句为什么不可以呢?

若选A:整句应为过去时态,而谓语动词为原形,不对;
若选C:首先还是时态问题,若句中用"became",也不对,应去掉"after";
若选D:不是倒装,选B才是谓语动词倒装.