Only then _____that I had made another mistake .But it was too la_其他解答

Only then _____that I had made another mistake .But it was too late
A:did i realize B:i realized C:i was realizing D:was i realize为什么要选A呢?

人气：362 ℃　时间：2019-10-24 02:46:08

解答

only then 要动词前提,类似虚拟语气的做法.所以did前提,后面用动词原型