Answer: By the time they came, we had finished our dinner.
Came is past tense, so I would assume it would be had finished
Katniss and Gale are more likely to be selected because they applied for the tesserae (food rationing) which means each year their names were added twice instead of once. So, there are more pieces of paper with their names on them with the possibility of being drawn.
Answer:
Theme
Explanation:
A theme is the topic of a story, the main idea is a bit of a summary. This format seems to be more of a theme than a main idea.