------ What happened to you yesterday evening? Why didn’t you finish your work?------____ the lights off, we could not continue our work. As a result, we had to leave.
Some passengers complain that it usually _________so long to fill in travel insurance documents.
Xi’an is really a fascinating city and we’ve decided to stay for two weeks.
His parents were teachers in that school, _______ lost their lives in order to save their students in the earthquake.
______ he referred to in his article was unknown to the general reader.
After a knock at the door, the child heard his mother’s voice ______ him.