第一个理由段主题句 1.The first reason that can be seen by every person is that _____.
2.The main reason why ____ is that ____.
3.The first and most important reason is that ____.
4.One of the most evident reasons is that____.
第二、三个理由段主题句 1.Another factor that we must consider is that ____.
2.Another factor that should be taken into consideration is that ____.
3.It might also be noted that _____.
4.Another reason why I agree with the above statement is that ____.
5.What is also worth noticing is that ____.
6.Perhaps another reason lies in the fact that ____.