根据句意选词填空。 worried upset stressed lonely ( 1 ) I’m Lucy, a middle school student. I am doing badly in my lessons. I’m . ( 2 ) I’m Sara, a secretary. I need to deal with too many things. I often feel . ( 3 ) I’m Tony, a college graduate. I’m busy looking for a job. I’m my future. ( 4 ) I’m Mike, a vocational school student. The overuse of the Internet and social media makes me .