Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions. Laura said she on the assignment since the day before.Đoạn văn8/40Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions. Laura said she on the assignment since the day before.hadworkedworkedhas workedwasworkingGiải thíchA. had worked