Mark the letter A, B, C, or D to indicate the correct answer: If you don’t workĐoạn văn26/40Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer. If you don’t work much harder, you won’t pass the exam. Unless you__________much harder, you__________the exam.work / will passdon’t work / will passdon’t work / won’t passwork / won’t passGiải thíchĐáp án D.