Mark the letter A,B,C or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.

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.