Kathy did not study hard, so she failed A. Kathy knew that she would succeed10/20Mark the letter A, B, C, or D to indicate the sentence that best combines each pair of sentences in the following questions. Kathy did not study hard, so she failed.Kathy knew that she would succeed in the examination.But for her hard study, Kathy would have succeed in the examination.Kathy studied very hard but she did not succeed in the examination.Had Kathy studied hard, she would have passed the examination.Giải thíchĐáp án: D Dịch: Nếu Kathy đã học hành chăm chỉ, cô ấy sẽ đã vượt qua kỳ thi.