I can’t connect my computer to the Intemet. There must be ______ wrong with it.

—Is this model plane yours,Susan?--Yes,it’s mine.It’s made by_________.

—May I borrow this dictionary? —Sorry. This is not       . It’s Lily’s. 

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

Gary: I can’t find my pen.   Nina: Is the one on Jack’s desk 　　　? Gary: Yes, Thank you.