- I thought you were going to the concert. - I was. But when I got there, the tickets………….. sold out. So I go back home.20/30- I thought you were going to the concert. - I was. But when I got there, the tickets………….. sold out. So I go back home. were/ had to was/had to had been/had to had been/have toGiải thíchChọn đáp án C