Here are the correct answers for each question:

1. **Do you have a notebook?**
Correct answer: **A. Do you have a notebook?**

2. **What is it? It's brown.**
Correct answer: **A. subject** (but contextually it fits better with **D. colour**.)

3. **I ______ chess at breaktime.**
Correct answer: **A. play**

4. **______ you have a school bag? - Yes, I do.**
Correct answer: **B. Do**

So, the final answers are:
1. A
2. D
3. A
4. B