用a或者the或者不填?

问题描述:

用a或者the或者不填?
1、The people of China are proud of Zhai Zhigang,( )man who has realized the Chinese dream of flying in space.
2、I will show you around ( ) Mount *.

1a,这里的a和可数名词单数一起做主语.
eg;a boy is playing on the playground.
2the这里的the用在景观前.
eg;the Great wall the Mountain Tai: