按照我国合同法的规定，导致合同的权利义务终止的情形包括( )。

A．债务已经按照约定履行

B．债务相互抵销

C．债务人依法将标的物提存

D．合同中止

E．债权债务同归于一人

请阅读以下短文，然后以约30词概括短文内容的要点。

Is Failure a Bad Thing?

Failure is what often happens in our life．Students may fail in exams, scientists may fail in their research work, and athletes may fail in competitions．

Although failure happens to everyone, attitudes towards failure are various．Some people don’t think their failure is a very important thing at all．So they pay no attention to it．As a result, they will have the same failure a period later．Some people think themselves are fools and lose their hearts in everything after they get a failure．Consequently, they spend their time and energy on useless things and they may really be fools as they have thought．

Other people are quite different from the two kinds of people mentioned above．Instead of being distressed and lost, they draw a lesson from every failure and become more experienced．After hard work, they will be successful in the end．It is said that failure is the mother of success．Success will be gained after times of failures so long as we are good at drawing a lesson from our failures．

In my opinion, failure is not a bad thing, the really bad thing is taking a failure as failure or even lose our heart after failure．