Answer:
i choose 8 because it is my lucky number
Explanation:
Past perfect because of the combination of the auxiliary "had" and the past tense of the verb "fall", "fallen".
1. Scientists CONJECTURED <span>that reducing the consumption of substances that emit harmful gases would reduce pollution.
2. </span> Jonathan was irritated by the VORACIOUS <span>noise made by the loud musical procession on the street.
3. T</span>he poor farmer was in for a pleasant surprise when he fortuitously <span>stumbled upon a pot of gold buried in his yard.</span>
