Look at the underlined part of the sentence below with three possible replacements for the underlined part given. If one of them (a), (b) or (c) is better than the underlined part, indicate your response against the corresponding letter. If none of these substitutions improve the sentence, choose (d) as your response.
Not a word did they speak to the others about the sad turn of events.
Answer: D
Correct answer is (d) or no improvement. This is because did they speak is the correct form of the tense in this case.