单项选择题 听力原文：The orchestra made a complete dog's breakfast of the fourth movement.What's true about the orchestra?A．It failed for the fourth time in public performance.B．Its performance was so charming that even a dog would enjoy it.C．It performed poorly the fourth movement.D．It did not complete the whole performance due to some specific reasons.

单项选择题 是保证人能成功地完成某种实际活动有关的稳固心理特征的综合。

单项选择题 自我存在是( )中的存在。