It was only after he had read the papers ________ Mr.Gross realized the task before him was extremely difficult to complete. (2013·大纲全国,30)
I’ve already forgotten you bought the dictionary.
It is he frequently returns home late makes his parents concerned about him.
(2013·马鞍山模拟)It was not until midnight they reached the camp site.
, you should keep it a secret; or you will ruin our plan.
Not until yesterday that I had made a serious mistake.