Present Perfect Simple

Nobody has ................. seen such a big tortoise before.
1. ever
2. never
3. since
Have you ever .................. to Germany?
1. gone
2. been
3. be
They have .................... explored that cave.
1. never
2. ever
3. since
I have known her .................. 2011.
1. for
2. yet
3. since
Mandy hasn't done her homework .............
1. just
2. never
3. yet
Mum has ...................... ironed my shirt.
1. ever
2. since
3. already
How ................. have you known them?
1. long
2. far
3. away
I haven't been to Italy .................. ten years.
1. for
2. since
3. just
We haven't decided ...................... where to go on holiday.
1. just
2. already
3. yet
I have ................ seen a ghost in the attic. (=σοφίτα)
1. ever
2. just
3. yet