1 how long has she worked for that company
She has worked for that company for 2 years.
2 who lan  has never met before.
Lan has never met him before.
3 what has been finished by hung 
Hung has finished his homework.
4 what has they just bought
They've just bought that bike.
5. where have you been for 2 months
We've been in Ho Chi Minh City for 2 months.
6. who have just had dinner with her 
She has just had dinner with her classmates.
7 where has lan  borrowed a lot of books from
Lan has borrowed a lot of books from her library.