---Jack was late for Mr. Smith’s oral class this morning. ---______? As far as I know, he never came late to class.
The boy was excited he went to Beijing.
In fact, there is _____ thing as a free lunch in the world.
This is the office _____ my parents are visiting now.
Everybody got ____ when they heard the ____ story.
Nobody can imagine what difficulty we had _____ home in the snowstorm.