First thing that makes me upset is hunger.
When I get hungry, I always be upset and cannot do anything.
I know imust endure sometimes, but it is very difficult.
Second thing that makes me upset is the homework.
Doing homework is good for me to develop my ability. However, when I get home, I have always no energy for doing homework.
The last thing that makes me upset is noise.
It wakes me up when I am very sleepy!!!