Theory:

     "Your Honour!" piped a small voice, "I also want to say something. ”Justice Mathematics looked carefully and found that the voice belonged to a small notebook, much in the same condition as others.
 
     "All right," he nodded, "please come to the witness box."
 
     The young Master Notebook marched to the witness box and took the oath, "Your Honour, it has become a regular practice and I don't know how long I will be able to bear it..." he stopped, all choked up.
Explanation:
 
Suddenly, Justice Mathematics heard a voice in the court. The voice wanted to convey something from its side. Finally, while looking carefully at the crowd, Justice Mathematics understood that the voice had come from a small notebook. Even the small notebook was in the same condition as others.

Justice Mathematics accepted his request and asked the notebook to stand in the witness box. The young Master Notebook did not even hesitate for a while; he went to the witness box with a determined decision to open out his issues. He took the oath and started to complain about his problems.

Firstly, he informed Justice Mathematics that Mahesh was doing something as a part of his regular activity; and the young Master Notebook did not know how long he would be able to bear it. He stopped and choked up while conveying the message; he was stuck for words and couldn't continue his argument.
 
Meaning of difficult words:
 
S.No
Words
Meaning
1.
Pipe
To speak in a high voice
2.
Oath
A formal promise
3.
Choked
Feeling sad, angry or excited that makes you difficult to speak
4.
Determined
Having strongly decided to do something
5.
March
To walk in a determined way
6.
IssueProblem or a subject that people discuss or argue about
7.
BearTo suffer or accept a bad situation
Reference:
State Council of Educational Research and Training (2019). Term-3 English Standard-6. BROUGHT TO BOOK: Madhumita Gupta (pp. 109-112). Published by the Tamil Nadu Textbook and Educational Services Corporation.