根据句意和所给中文提示写出单词
1.People in the USA can receive driving( ) 执照at the age of 16
2.The scientist who graduated from nanjing( )大学is famous in the world
3.Who( )降落the spacecraft on the moon in 1969?
4.It is said that most( )法国人are romantic
5.When did you begin to study(
6.As the( )市民of the city,we should keep our city beautiful