Which sentence shows that the author is using first-person point of view?
it was a lazy sunday afternoon. the sun was blazing over the roof, baking us all like cookies in an oven. i was lying on the sofa reading an old book. i was home alone because my mom had gone to her friend's wedding. she had asked me to come along. but who would want to step out in the scorching heat? the only activity worth doing on a hot afternoon is to read a good book while sipping lemonade. i had just begun to enjoy the book when there was loud knock on the front door. i looked up and wondered if it were a robber, a salesperson, or just the next-door lady looking for sugar. our neighbors were funny people. they would run out of things at the weirdest hours. i put my book away and walked to the door.