1.They have been here since 2000.___ ___

1.They have been here since 2000.___ ___
1.They have been here since 2000.___ ___ have they been here?2.The old man ___ last year.He ___for a year (die )(动词填空) 3.Miss Gao left an hour ago.(同义句) Miss Gao ___ ___ ___ ___ an hour ago.

/>How long

died has been dead

has been away since

这里是现在完成时,我是英语老师,保证正确.