—It's black.
—______________. Nice to meet you.
—Fifteen yuan a kilogram.
—It's 50 dollars.
— Because it's interesting.
—She's twelve years old this year. Oh! Today is her birthday.
—It's on April 20th.
—It's in my pencil box.
is Bob in?
?
is her sweater?
is the sweater?
does Mary for breakfast?
— the weather in Lanxi in winter?
— is it today?
are books?
his jacket?