III, 
1, Vietnamese students have to wear uniforms when they go to school
2, You mustn't use your mobile phone on the plane
3, It takes 3 days and 2 nights living in a village in the programs of "Daddy, where are we going?"
4, More and more people prefer living in the countryside than in the cities
5, People living in the countryside don't have to drive as carefully as those living in the countryside