单项选择题


SECTION A CONVERSATIONS
In this section you will hear several conversations. Listen to the conversations carefully and then answer the questions that follow.
Questions 1 to 3 are based on the following conversation. At the end of the conversation, you will be given 15 seconds to answer the questions.
Now listen to the conversation.
According to Kellerman, why are there so many unhappy adults in the world

A.Becanse they are not brighter than others.
B.Becaase they don’t have good education.
C.Because they are not doing the things they are best at.
D.Because they are not duly encouraged in life.