— do you surf on the Internet?—Once every week. I watch some latest news and chat with my pals there.
—_______ is the ruler? Is it black? —Yes, it is.
—What’s that? —_____ is an eraser.
—______ is this? Is it a ruler? —Yes, it is a red ruler.
—Is that _____ orange, Jack? —No, it’s ______ watch.
—What ____ this in English? —It _____ a book.