Send a question paper and answer sheet, students read, students listen.And store the question and the reply after they completed the examination.To let them cross into answer sheet
Send a question paper and answer sheets to students and reading tests to students and collect question papers and answer back after they finished so that they cross in the answer sheet.
Send the paper questions and answer sheets to students and read the exam for students to listen.And collect the paper questions and answers back after their exams.So they cross into the paper answers.