根据所给时间状语改写下列句子
How old is your sister?
_________________________last year?
Are his parents workers?
________________________ten years ago?
参考答案:how old was your sister last year?
Were his parents workers ten years ago?
How old is your sister?
_________________________last year?
Are his parents workers?
________________________ten years ago?
参考答案:how old was your sister last year?
Were his parents workers ten years ago?