Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions. My sister playing the piano since she was a child.Đoạn văn13/40Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions. My sister playing the piano since she was a child.practisedhaspractisedpractisesGiải thíchB. has practised