假如你是李华，某校高三年级学生，你想给曾经教过你的外教Alan写一封邮件请教在英语学习上遇到的一些问题。主要内容包括：英语成绩不理想； 2。恐难进心仪大学；3。花时多，收效少……要求：1.不要逐条翻译，可适当发挥，行文通畅；2.词数：120左右DearAlan,--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Bestwishes