| UNIT 5 The Riddle apologized debt hasty inquired lamented refreshment labor legal captain fasten tunnel answer regular single camel pardon chosen castle clever apron terror twinkle central sweater grammar riddle |
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| Tonweya and the Eagles cleft consented defiantly gratitude sacred tribute sign wrist knit lightning gnaw autumn knuckle wring naughty gnat column knowledge wrench brighten dough campaign handwriting bough solemn gnarled |
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| Life in Flatland dimensions distinguished landscape thickness trifle unique constant consult neglect patrol accuse distance compose dozen collage compass torrent focus purchase payment possess ransom method emblem hammock support |
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| Breaker's Bridge dismay gorge immortals murky piers scheme aren't we'd would've we'll you've hasn't you'd haven't where'd what'll they're how's needn't she's mustn't there'll must've who'd who'll should've |
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| Time for Kids: Cleaning Up America's Air fumes protective regulations standards stricter width illness breathing oxygen health heart kidneys safety organ lungs reaction headaches vitamin hazard substance particle smog artery ozone symptom allergy |
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