--- ___ do you like dolphins? ---Because they are very smart.
----Is Bill your cousin?-----_____. He’s my brother.
-----What color is it? It’s_____.
---This is my____ and these are her______.
---Is this your pen? --No, it isn’t.----______this dictionary ?is it yours?---oh, yes, it’s mine.
---I lost my school ID card.---You can ask the teacher____ it, but you must call her____36404564 first.