1. (2019·金山模拟) Questions are based on the following passage.

1. （1） According to the passage, why are middle children more likely to be in a managementposition?

   A . Mark Zuckerberg and Bill Gates are middle children. B . Competitive and flexible personalities decide their success. C . They share the idealistic personalities and pursue perfection. D . Their sensitivity to the surroundings leads to their achievement.
3. （2） What are the most potential career roles for the only children?

   A . Scientists. B . Chief executive officials. C . Artists. D . Classical music players.
5. （3） What is the passage mainly about?

   A . Family size plays a part. B . Birth order affects personality. C . Birth order influences career paths. D . How people achieve their success.