What happened to you?
Mary happened to walk by at that exact time.
What happened to my house?!
I happened upon this lovely scarf at an estate sale.
in modern time many bad and good things happened
A sentence with the word abruptly is: An earthquake happened abruptly, and not one person knew what had happened.
"She looked very hostile, it seems that she hadn't forgotten what happened yesterday."
what is a good sentence for the word opposite
A good sentence for the word baffled is:
He told his story without embellishment, relating just the facts as they happened.
The word "be" is the fourth word in this sentence.
She was agonized because of what had happened.
Any sentence that properly uses the word additionally is a good sentence. Additionally, the above is a great sentence.
Your question is a good sentence using the word "common".
"I am using a sentence with the word economics."
There is not just one good sentence for "there," there are many.