I agree with your choice about Scout not liking the first-grade teacher. My reason for this would be that would definitely indicate trouble on the rise.
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Answer:
yes
yes the word good have a good meaning that is
good: the behaviour that is acceptable and correct
All of the nouns used (hammer, chain, furnace, brain, anvil) are explaining mighty things that the tiger is being compared to. The poem is simply saying that they are smart, speedy, and strong.
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~Travis