As Hallie wrote, tears drips onto the paper in front of her. She misses her best friend, Alexandra so much. Alexandra move to California two months ago. Even though the two girls frequently talking on the phone and wrote letters to each other, it just wasn't the same. Hallie still feels sad every time she had to tell Alexandra something in writing instead of in person. Today, Hallie felt especially sad writing Alexandra because the thing she has to told her was bad news. Hallie's cat, Bells, had die. Both Alexandra and Hallie loving to play with Bells. Writing about life without Bells made all of Hallie's sadness come back.

What does the writer need to focus on editing in this paragraph?