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最佳答案:I'm 3 years old,you're 4 years old.I'm younger than you are.There are three boys
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最佳答案:safest、cleverest、cleanest、youngest、thickest、softest、hard、richest、quietest、deepes
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最佳答案:1.younger2.bigger3.more beautiful4.longer5.the busist6.the tallest7.heavier8.the
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最佳答案:cleverer (或more clever)cleverest(或most clever)nicer nicest bigger biggest young