1.  I knew her reason for saying such things.

2.  I learned a lot from this lesson and became to know the reason of my failure: I gave up too easily and could not be persistent on English learning.

3.  Well, do you want to know the reason?

4.  Only when people know the reasons and alter their behavior, can boys and girls have an enjoyable conversation.

5.  In my thought, it needs to know reasons why the beauty contest is held.

6.  Therefore, it's easy to know the reason why there are such different impressions of communication in marriage and widespread conflict between men and women.

7.  However, once knowing the reason, we can solve this problem easily and avoid conflicts successfully.

8.  As for this phenomenon, I am eager to know the reason why academic performances vary from person to person.

9.  Having known the reason of the problem, we should make men and women understand each other more and decrease their conflicts.

10.  If you want to know the reason why we became best friend, Iwill tell you with embarrassment.