Student A: How long have you collected stamps? Student B: ______________Đoạn văn23/55Mark the letter A, B, C or D on your answer sheet to indicate the sentence that best completes each of the following exchanges. Student A: How long have you collected stamps? Student B: ______________ For five years.Five years ago.Since I have free time.When I was in grade 5.Giải thíchChọn A