Mark the letter A, B, C or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.
John was not here yesterday. Perhaps he was ill.
A. John might have been ill yesterday, so he was not here.
B. Because of his illness, John shouldn’t have been hare yesterday.
C. John must have been ill yesterday, so he was not here.
D. Although John was ill yesterday, he need be here.
Đáp án C.