In our school library there a number of books on science and the number of them growing larger and larger.
—What ____ is Jane in?—She is in ____ Six.
—what are ____ ?—____ are buses.
Linda is fifteen ____. She is in Class 1, Grade 9.
This is my teacher, Miss Chen. ____ is from Hebei.
—I’m in Class 4. Are you in Class 4, ____? —Yes, I am.