Here are the suggested answers to fill in the blanks with the present simple form of the verbs:

1. Julia **walks** her dog, Bones, for a walk three times a day. She **is** a very responsible person.
2. My brother **never spends** his pocket money on trifles. He **saves** it for traveling.
3. The teachers **wear** (not) uniforms. Sometimes they **put on** a white coat to protect their clothes.
4. I **write** very good essays, but I **am not** very good at maths.
5. Who **comes** to your birthday party?
6. We **play** karate, **volleyball**, and lots of sports.
7. Where **is** (Paul) jogging?
8. Trudy **works** (not) for any magazine.
9. My grandparents **visit** me very often.

Feel free to adjust the verbs if the context suggests a different meaning!