how old is your mother 回答用AT还是用About?

how old is your mother 回答用AT还是用About? How old is your mother?回答句子 How old is your mother怎么回答 How old is your mother?还是应该are your mother? How old is your mother? How old is your mother?这怎么回答啊 How old is your grandmother?(用73岁回答) 按实际情况回答问题How old is your mother?Do you often watch TV?Does y How old is your brother?回答 how old is your father怎么回答 how old is your mother?改为同义句 ----your---- -----? I WANGT TONOW YOUR AGE.回答：HOW OLD ARE YOU?还是WHEN IS YOUR BIR