Sure! Here are the answers filled in:

1. **Did** you start a community garden project last month?
2. Last week, we (not) **didn't** visit sick children in Viet Due Hospital.
3. **Was** there anything that made you happy with your work last month?
4. It **was** Tom's fault. It's mine.
5. What **did** you do in the summer?
6. **Did** she visit Hue when she was a child?
7. Mimi and Lucy **were** at home in Florida last week. We were at Ben's house in Miami.
8. He (not) **didn't** come to the party last Sunday.
9. Julia (not) **didn't** wear a uniform to school yesterday.
10. **Was** John at work today? "No, he **wasn't** in the office. I think he's sick."

Let me know if you need any more help!