He is one of the cleverest students ________ hard work was paid in the end.
—______ 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?
选出不同类型的一项。