________ the lead scientist not documented the initial experimental failure, the team would be repeating the same mistake right now.
Choose the correct word to complete the negative inverted conditional sentence.

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A Hadn't
B Had
C If
D Should

Show answer and explanation

Answer: B. Had

Correct Answer: b) Had
Explanation: In formal inverted conditionals, you cannot use a contraction like "Hadn't" at the start of a sentence. The correct uncontracted structure is Had + subject + not + past participle ("Had the lead scientist not documented...").

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________ the lead scientist not documented the initial experimental failure, the team would be repeating the same mistake right now. Choose the correct word to complete the negative inverted conditional sentence.

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________ the lead scientist not documented the initial experimental failure, the team would be repeating the same mistake right now.
Choose the correct word to complete the negative inverted conditional sentence.