Answer:
All of these are acceptable corrections:
Mary fell on the way to get the mail. She didn't want to go to the doctor.
Mary fell on the way to get the mail; she didn't want to go to the doctor.
Mary fell on the way to get the mail, yet she didn't want to go to the doctor.
Mary fell on the way to get the mail; nevertheless, she didn't want to go to the doctor.
Even though Mary fell on the way to get the mail, she didn't want to go to the doctor.
Explanation:
