（1）When did the activity start in Northern Ireland？
A.In 2012.
B.In 2017.
C.In 2021.
（2）What does one organizer advise people to do？
A.To buy a bike for their children.
B.To teach their children traffic rules.
C.To walk to school with their children.
（3）What does the speaker mainly talk about？
A.Road safety.
B.Green Travel.
C.Healthy habits.