Question

2.which one of the pair expresse necessity A.you have to be very careful choosing friend B.you can be very careful in choosing friend 3.which one of the pair expresse moral obligation A.parent should teach their children how to make good decision B.parent must teach their children how to make good decision 4.which one of the pair expresse more formal and polite way of saying that someone has permission A.students may travel free B.students can travel free

Answer 1

Answer:

2.A , 3.B ,4.B: Students can travel free