1. Not sleeping
2. His brain cant function properly due to him being tired
3. Get some sleep or get a schedule to efficiently practice mathematics
Pls mark as brainliest
Answer:1=cs
2=s
3=s
4=cs
5=s
6=I enjoy sitting by the fireplace and reading.
Waiting to have my car's oil changed is boring.
She wants to travel the world and see wonderful sights.
Our planets revolve around the sun.
The professor always comes to class fully prepared.
Hurricanes strengthen over warm waters.
Explanation:
Could you give more context?