____ might be Alex's schoolbag.
Tiantian makes the schoolbag with her ____.
A. pencil box B. books C. schoolbag D. pen E. rulers
A: Hello, John. Your schoolbag is so cool. What's in your ?
B: A and some .
A: What's in your ?
B: Let's open it and see.
A: Oh, three . How nice!