choose the word or group of words that best completes each of the following sentences.
No sooner had we set off ....... it started to rain
Answer Details
The word or group of words that best completes the sentence is "than."
Explanation:
The sentence is describing a sequence of events - first, the speaker and others set off on a journey, and then it started to rain. The phrase "no sooner" is used to indicate that the second event happened very soon after the first. The correct construction is "No sooner...than," so the sentence should read "No sooner had we set off than it started to rain." The other options do not form a correct comparison, so they are not appropriate to use in this sentence.