She showed the visitors around the museum, the construction __________ has taken more than three years.
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.