From the words or group of words lettered A to D, choose the word or group of words that best completes each of the following sentences: No sooner had they ...

Answer Details

The correct option is "than". The sentence structure indicates that the speaker left the hall immediately after "they" arrived. The phrase "no sooner" is used to emphasize the immediacy of the action that follows, and "than" is the correct conjunction to connect the two clauses. Therefore, the correct sentence is "No sooner had they arrived than we left the hall."