they went to a film,……?ADid they?BDidn’t they?CDo they?DHaven’t they?Answer: B. Didn’t they?Read Explanation: Question tags are formed with the auxiliary or modal verb from the statement and the appropriate subject. A positive statement is followed by a negative question tag. Eg: Jack is from Spain, isn't he? A negative statement is followed by a positive question tag. Eg:They aren't funny, are they? Here went is the V2 form, hence tag must be with did. also the sentence is positive, so tag must be negative. Open explanation in App