Unit3 Is this your pencil课后练习（二）
题一：1. Look! What’s ______ in English? It’s an eraser.
A. these B. this C. those
2. Are ______ your watches there?
A. these B. that C. those
3.---______ your costs? ---No, ______.
A. Is this, it isn’t B. Are these, they aren’t C. Are those, those arn’t
题二：_____ math books. They’re _____ books.
A. Their, they B. They’re, their
C. Them, their D. They, them’s
