Many parents find it difficult _______ with their children.
—Who’s the girl in red? —Sorry, I don’t know ____. —____ is a new student.
—____ is Maria? —She is twelve.
Sally often helps me study English. And I help her study Chinese. We help _____.
—____, Tom. Is this your book? —No, it isn’t. I think it’s ____.
—What class are you in? —I’m in ____, ____.