用tour,start,stop,win,become完形填空

用tour,start,stop,win,become完形填空
1:How old were you when you ( started ) learning English?
2:What can I do to ( become ) famous?
3:He ( stopped ) playing soccer because of his sore back.
4:The Chinese soccer team ( toured in ) Asia last year.
5:John ( won ) first prize in the speech competition.