I used to think education was the most important thing in my life. Recently my attitude has begun to change, although I still hold that it is _ for everyone in the world today. As a top junior student in my college, I was asked to make a speech on how to learn English well. Standing in front of the audience and facing so many freshmen, I was trembling. I didn' t remember any word that I had prepared. I ran out of the conference room without finishing my speech, leaving everyone puzzled. I cried that night in my room, feeling that I was a loser. Studying takes up so much of my time that I feel unable to really develop myself. I am just storing knowledge, yet I fail to communicate with others. I have received many awards in school, but they don't necessarily reflect anything about me. I don't know how to socialize. When I leave school I fear I will be of no use to society. I realize that everyone has his own way of living. I want to change my lifestyle. Of course I will keep studying. Yet I plan to look for a part-time job, which might turn out to be a good chance to get to know society. I still believe that working my hardest makes me happy. I will still stay on in college. But I will not allow it to shelter me from the real world. The author feels fearful that she will be of no use to society mainly because   _  .
she does not know how to communicate with others she is unable to develop herself studying takes too much of her time she feels that she is a failure.