Mark the letter A, B, C or D on your answer sheet to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions.
He asked me _________ Robert and I said I did not know _________.
A. that did I know / who were Robert
B. that I knew /who Robert were
C. if I knew / who Robert was
D. whether I knew /who was Robert