为你解答.
1、She （has lived）here ever since she was ten.
2、Both of them （have been）in Hongkong for ten days.
3、Half an hour （has passed ）since the train （left）.
4、Mary （has lost）her pen.（Have）you （seen）it here and there ?
5、（Have）you （found）your watch yet?
6、--- Are you thirsty?--No, I（have）just （had）some orange.
7、We（have）already （returned）the book.
8、（Have）they （built）a new school in the village?