He did not work hard. He failed the exam.
A. Even though he failed the exam, he didn’t work hard.
B. Unless he had worked hard, he would have failed the exam.
C. If he had worked hard, he would have passed the exam.
D. However hard he worked, he failed the exam.
Đáp án C
Cậu ấy không học chăm. Cậu ấy trượt kì thi = Nếu cậu ấy học chăm, cậu ấy đã có thể qua kì thi rồi. (Câu điều kiện loại 3, diễn tả một hành động không xảy ra ở quá khứ)
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