A:Hello,Mary I saw apencil in the lost and found case.Is that(1)_______pencil?

A:Hello,Mary I saw apencil in the lost and found case.Is that(1)_______pencil?
B:Well,what color is it?
A:It'sred.
B:Oh,it's not(2)_______ pencil.Mine is black.I think it is Peter's (3)______pencil is red.
A：Where is Peter?
B:Sorry,(4)______ don't know.You can ask his sister.Look!(5)_____ is over there.
A:Thank you