11.20The international event,"Walk to School Week"activity began in _______.
21.The____"Walk to School Week"took place in Northern Ireland in 2012.
22.The activity in 2012told children to develop the habit of______ travel.
23.Walking to school saves money and makes the traffic better around school____.
24.The activity would make travel to and from school safer and more_________.
25.In fact,1/5of people around Northern Ireland_________ to pick up their children after school.