THEY OFTEN WENT TO VUNG TAU AT WEEKEND

4- They often went to Vung Tau at weekend.A- They used to go to Vung Tau at weekend.B- They are used to go to Vung Tau at weekend.C- They were used to go to Vung Tau at weekend.D- They used to going to Vung Tau at weekend.5 My father started to give up smoking last year.A- My father has given up smoking since last year.B- My father started to give up smoking since last year.C- My father has give up smoking since last year.D- My father gave up smoking since last year.