假如你是某英文杂志负责“与读者对话”栏目的编辑。请根据下面这封读者来信写一封回信，帮助解决读者来信中提出的问题。
注意：1. 词数120左右；
2. 邮件的开头和结尾已给出，不计入总数；
3. 可根据要点适当增加细节，使行文连贯。
Dear Editor,
I am going to take the college entrance examination soon. I have to work harder and harder to prepare for it so that I could enter a good college. However, it’s hard for me to understand what my teachers say in class. Though I tell myself again and again I should hold on, I have little confidence in myself. What should I do now?
Best wishes,
Li Hua