BaoNguye BaoNguye 11-08-2021 English contestada 1.It's impolite of them to wear hats in the pagoda(shouldn't) -> 2.Children have to live with their parents until they reach the age of 18(obliged) -> 3.Is it necessary for me to tip in a coffee shop?(have to) -> 4.It's not mandatory for staff to wear vests in their company(need) -> 5.It's good for us to keep our traditional customs(should) ->