I'm not exactly sure what you're asking, but I'll try.
The answer is "compro" because it's past tense. I should know, I speak both Spanish and English.
Answer:
Um. Where is it? I don't see it
Answer: 2. What are incidental sentences for? Give two examples of sentences with incidentals. Is the meaning of the sentence altered if you eliminate them in your examples?
Explantion: i took spanish