1.  We need to think this question in a deep degree so that we can benefit from it.

2.  The reason, I think, is about the special way for us to think questions.

3.  But , have you ever thought the question , how to make friends, in other word is that what should we pay attention to when we make friends.

4.  I think the reason is about the special way for us to think questions.

5.  As a college student, I am thinking a question for a long time, "whether the Chinese educational system is successful? "

6.  They ask questions , think questions and solve questions.