The sentence fragment present in those sentences is...
Regina and her younger sisters.
The purpose of the dictionary is all of the above EXCEPT to eliminate dialect and slang.
Answer:
They argued with the waiter because of some misunderstanding.
I'm afraid that I'm unable to help you. I don't have enough time.
We will never accept your unreasonable demand
You should go to this school because it has excellent reputation
Many soldiers heroes died in the resistance war.
Tan Son Nhat is an international airport. It should be larger in a near future.
She speaks with persuasion. This is the reason why that man trusted her
Our vacation was spent enjoying in a small village by the sea.
Alcohol advertisement is strictly prohibited in this country
You must familiarize yourself with the use of these modern machines.
Does your sister work as a sports editor for the Bang Da Plus ?
She said to me I would have to work harder next academic year
You should go to Seattle school of English. It's highly reputable.
This is a careless construction, which is grammatically correct and is not an idiom or a jargon.