Fill in the blank with the appropriate verb form. If you had not hurr…

The correct answer is Option (1) → would have missed

Third conditional (an unreal past):

• This kind of sentence talks about a past event that did not happen.
• The if-part takes had + past participle (V3).
• The main part takes would have + V3.
• In fact, you did hurry and caught the flight.
• The sentence imagines the opposite.
• So the main part needs "would have missed".
• Complete sentence: If you had not hurried, you would have missed the flight.

Why the Other Options are Incorrect?

Option 2: will miss — Incorrect.

• "Will miss" talks about the future.
• It goes with a present tense if-part, not with "had not hurried".
• Example: If you do not hurry, you will miss the bus.

Option 3: would miss — Incorrect.

• "Would miss" is for an imagined present or future.
• It goes with a past simple if-part.
• Example: If you left now, you would miss the speech.

Option 4: had missed — Incorrect.

• "Had missed" is the past perfect.
• In this sentence type it belongs in the if-part, not in the main part.
• Example: If I had missed the train, I would have taken a taxi.