Нужно срочно....
I haven't seen Mary ____ 1999 year.
She has never been ____ the USA.
They have been working to yether ____ ages.

I haven`t seen Mary since 1999 yearShe has never been in the USAThey have been working to yether for ages

I haven`t seen Mary since 1999 year. Я не видел Мэри с 1999 года.She has never been to the USA. Она никогда не была в США.They have been working there for ages. Они работали там испокон веков.