—Where is my pen? —Oh, sorry, I have taken________ by mistake.

--         is your father           ?  -- He is watching TV. 

—Have you ever seen a panda , Linda?—Yes , I just saw _________at the zoo last Sunday .

— Can I use your notebook computer this afternoon? ________ is under repair.— No problem. 

       —Jim, Tom is looking for his English book. Is this ______?—No, that is______. I don’t know wherehisis.