—Here is _____eraser. Is _____eraser yours?—Yes, it is. Thanks!
—What were you doing at this time yesterday? —We _______ in the classroom.
—Must we finish the project in a month? —No, you _______.
—Which is _______, the sun, the moon or the earth? —Of course the sun.
—How many students are there in your school? —_______ students, I think.
—Would you mind my smoking here? —_______ It’s not allowed here.