I’m very happy that my lost pet bird arrived home ________ a snowy morning .
—Is this your baseball, David? —No, it's not . It's Helen's.
— ________is your notebook? —It’s green.
Look at the map. It’s a map ________ China.
Jim often has lunch at school. he eats at home today.
— ________ our school ID cards? —They’re on the teacher’s desk.