7. (+) They Are at the lobby (-) (?) 8. (+) this is your luggage (-) (?) 9. (+) that is mr.hardono (-) (?)

7. - They are not at the lobby
? Are they at they lobby ?
8. - This is not your luggage
? Is this your luggage ?
9. - That is not Mr.Hardono
? Is that Mr.Hardono ?

7.(-) they are not at the lobby
(?) are they at the lobby

8.(-) this is not your luggage
(?) is this your luggage

9. (-) that is not mr.hardono
(?)is that mr.hardono