Checked out
Checked out is not domain specific language. When talking about medical visits, checked out is an informal term for having a medical evaluation. A check-up is a routine procedure done yearly that is normally called a physical in the medical field. A fall is a fall. There is no other domain specific vocabulary that can change this. Clinic and injuries are all typical domain specific terms that can be applied in medical situations.
I think the correct answer is "The president lives at 1600 Pennsylvania Avenue, NW, Washington, DC 20500" because in writing the address in the sentence it requires comma each part of it and in between the sate and zip code there is never a comma.
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there is a summary of the book, if you dont know the answer i suggest you read the book or read the summary (:
Answer: just chilling in their classroom because its raining
Explanation: