A string quartet will have how many players?, 3, 4, 5, 6, Carbon dioxide. How many oxogen?, 1, 2, 3, 4, Octogenarian. How long ago where they born?, 90 years, 100 years, 80 years, 60 years, Phosphorus pentachloride. How many chloride?, 2, 5, 3, 8, A centennial celebration happens, every 10 years, every year, every 100 years, every 1000 years, tetraphosphorus heptasulfide. How many sulfide?, 4, 6, 5, 7, A bicentennials happen when?, every 100 years, every 200 years, every 2 years, every time there is a bicycle., A centennial celebration happens every 100 years. An anniversary celebrates a year since something happened. An annual check up happens every year. Perennial flowers return every year. What does the root anni/annu/enni mean?, something nice, happening often, I don't know we haven't learned this!, year based, celebration

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