I. 1. your, My, that 2. that, He 3. She, your, she 4. that, He, his, He
III. 1. What is your hobby?
2. Is Li Yan good at drawing?
3. My father doesn’t work in a factory.
4. Your mother is interested in(likes) cooking.
5. What is your father’s hobby?
IV. speak, speaking, This, doing, watching