—What color is the ruler? —_____A.It's a blue ruler.B.It's a blue.C.It is blue.
—Excuse me, whose Japanese book is this?—It _______be Tom’s. In our class, only he is studying Japanese.
Vienna is ______old city ______the river Danube.
---Whose(谁的) is the ruler?---It’s not_______. It’s ________.
Here ______two books and a pen on the desk.
---_______my beautiful pencils?---They are on the table.