2 and 3 are correct 1: I was in the car. We were heading to the maple syrup tour yesterday morning Well done!

She didn't use the door

She appeared from time to time in my flat, always at night. I never realized when she got inside. She didn't use the doorbell. I usually found her sitting on the couch watching the TV. At first it was quite scary but over time I got used to her frightening way...
Little by little we became friends. I have to say that she was very friendly and she was always in good mood. We could talk to each other for hours. She was very cultured and knew a lot about history, specially about things that happened centuries ago. She could describe some facts from the past well, as if she had lived that time. However she only talked about what she wanted and never answered questions about her.
One time I asked about her origins and descent. I still didn't know if she had a family. She told me that it would be much better for me if I didn't know some things. Her look became danger at times but she never stopped to smile at me.
Just as she appeared she disappeared. You could never guess when this would happen. I never gave her a key from the door. I started to think that she used the window but this thought was not very reasonable as I lived on the seventh floor...

This is amazing for a non native speaker! Well Done!