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.
Until he spoke, I hadn’t realized he didn’t know anything about the subject.
A. If he didn’t speak, I wouldn’t realize he didn’t know anything about the subject.
B. If he hadn’t spoken, I wouldn’t have realized he didn’t know anything about the subject.
C. Unless he spoke, I wouldn’t realize he didn’t know anything about the subject.
D. When he spoke, I hadn’t realized he didn’t know anything about the subject.