HOTS English Primary 4 Grammar

If the engineers _______ the structural flaws earlier, the bridge _______ and the city _______ the costly repairs it now faces.

A had identified / would not have collapsed / would have avoided
B identified / would not collapse / would avoid
C had identified / did not collapse / avoided
D have identified / will not collapse / avoids
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Worked Solution

Step 1: The sentence describes an unreal past situation (the engineers did not identify the flaws — but what if they had?). Step 2: Third conditional structure: if + past perfect (had identified) → would have + past participle (would not have collapsed / would have avoided). Step 3: All three blanks follow the third conditional pattern. Answer: had identified / would not have collapsed / would have avoided

Correct answer: had identified / would not have collapsed / would have avoided

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