--It's a top secret.--Yes, I see. I will keep it you and me.
—What ____ is Jane in? —She is in ____ Six.
—Welcome to our school. —____
Linda is fifteen ____. She is in Class1, Grade9.
This is my teacher, Miss Chen. ____ is from Hebei.
—I’m in Class4. Are you in Class4, ____? —Yes, I am.