. —- Is the letter yours? —- No, it’s not mine. It’s_____.

My keys are in my bag. keys under that desk aren’t mine.

______ my camera wasn’t working; there is no battery in it.

Is this ______ dictionary?—No, ______ isn’t. It’s ______ dictionary.

Do you know the boyis sitting next to Peter? -Yes,He is Peter’s friend,They are celebrating hisbirthday.