Listen! There are some birds _________ in the tree. What a beautiful morning!
—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.
—How ______ you, Jack? —I’m fine. And you?