补全问句：( ) is the balloon?-It's purple.
( ) is the art room?-It's on the second floor.
( ) is it? -It'seight o'clock.
( ) umbrella is it?-It's Zhang Peng's.
( ) are the slippers?-They're six yuan.
( ) is the weather like in Lanzhou?-It's hot.
( ) goats are there?-Twenty.
( ) is that man?-He is Mr Black.
( ) are you?-I'm twelve.
( ) are you?-Fine,thanks.
( ) is in that box?-It's a mouse.