单项选择题

Questions 14 to 16 are based on the following passage. At the end of the passage, you will given 15 seconds to answer the questions.
Now, listen to the passage.
Psychologists hold that______.

A．one is born optimistic or pessimistic
B．pessimism is inherited
C．optimism is acquired when one is very young
D．pessimism is a long lasting habit

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单项选择题

单项选择题

Questions 14 to 16 are based on the following passage. At the end of the passage, you will given 15 seconds to answer the questions. Now, listen to the passage. Psychologists hold that______. 您的浏览器不支持 audio 元素。