We____ ____ ____succeed in the end.

刘敏说：“我学习很刻苦，也制订了学习计划，常常学习到深夜，可是我的成绩没并有提高，真是苦恼!”出现这种情况的原因是 (    )
① 她没有掌握适合自己的学习方法，学习效率低下
② 她太不聪明了，有点笨
③她总是在浪费时间，说是学习，其实是在开小差
④她没有合理安排好自己的学习时间

阅读理解

    Once upon a time，King Swan(天鹅国王)had a beautiful daughter．On her 15th birthday,she wished that when she was old enough,she could choose her own husband．King Swan agreed with her．

    When the princess(公主)was old enough，King Swan called all me birds to his home．Birds came from everywhere，even from far away．King Swan told his lovely daughter to choose one she liked．She looked over the many birds．Finally,she chose a green long-narked peacock尼(孔雀)．She told her father，"This bird，the peacock，will be my husband．"

    Hearing that me peacock was the lucky one，all me other birds crowded around to congratulate(祝贺)him．The excited peacock said nothing but held his head high．Later he began to shout and show his beauty in a strange dance．The other birds strange to laugh．

    King Swan was angry．Standing in the middle of the birds，he said，"Sir Peacock，your voice is sweet,and you're really very pretty.But you are not modest at all．I will not allow my daughter to marry you!"

    The princess also learned she was wrong．Then King Swan married his daughter to a modest bird．The peacock flew away，having lost a beautiful wife．

根据材料内容选择最佳答案。