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英文字母練習(A-Z) http://www.billybear4kids.com/worksheets/practice-a.htmlhttp://www.billybear4kids.com/worksheets/practice-b.htmlhttp://www.billybear4kids.com/worksheets/practice-c.htmlhttp://www.billybear4kids.com/worksheets/practice-d.htmlhttp://www.billybear4kids.com/workshee...