最佳答案:over 50,more than 50,in one's fifties不明白的再问哟,请及时采纳,多谢!
最佳答案:a 10-year-old child. a child of ten
最佳答案:分别是:(1)Tom is a ten-year-old boy.(2)Tom is a boy of ten years old.(3)Tom is a bo