Cleft sentence: It was ... that (not where/did)

This type of question, asked 2 times: 17 Sep 2025 S3, 18 Sep 2025 S1. All 2 questions below, oldest first.

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Question 1
17 Sep 2025 S3
87 $Find the part of the sentence that contains an error: It was not until the second report (1)/ was leaked to the press (2)/ did the ministry issue (3)/ a formal clarification. (4)$
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Question 2
18 Sep 2025 S1
86 $Find the part of the sentence that contains an error: It was at the summit in Vienna (1)/ where the treaty was officially ratified, (2)/ thereby bringing to an end (3)/ decades of political uncertainty in the region. (4)$
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Question 1