Answer:
1. Anna put five hot dogs on the grill.
2. My dad is fixing the broken laundry machine.
3. John is walking through the dense forest.
4. Peter turned off the fire alarm.
5. Amber is working on her scientific experiments.
Explanation:
Questions of this kind give you a lot of freedom, as you can write almost anything. The only condition is to add the subject and the predicate. To accomplish that successfully, you need to know what that means:
The subject is what or who the sentence is about.
The predicate tells you what the subject is or does.
For example, My dad is fixing the broken laundry machine.
The subject here is my dad. What is he doing? He is fixing. That is the predicate. What is he fixing? The broken laundry machine. That is the object, something the subject is acting upon, and the fragment you were given.