David had prepared carefully for the chemistry exam, as he wanted to be sure of passing it at the first _____.
All of us still remember the terrible earthquake that _______Tangshan twenty years ago.
The College Entrance Examination __________near, so you should be prepared for it.
— Is he said ____ his car lost?— Yes. He was so foolish ____ leave his car ____.
Whether we’ll hold the sports meet depends on the weather, _____?
I went to bed very late last night, _____, early the next morning.