Explanation

"I will be ready by the time you get here."

The correct preposition to use in this context is "by".

It indicating that readiness will be achieved before the specified time of arrival.

Explanation

The correct phrase is "They laughed at him."

وہ اس پر ہنسے۔

It means to mock or make fun of someone.

Explanation

Everybody blamed him for the accident.

سب نے اسے حادثے کا ذمہ دار ٹھہرایا۔

For is used to indicate the reason or cause of blame in this context.

Explanation

The railway track runs across the river.

"Across" is used when something extends from one side to the other of something — like a river, road, or field.

So, "The railway track runs across the river" means the track goes from one side of the river to the other, likely via a bridge.

Explanation

He is notorious for his crime.

وہ اپنے جرم کی وجہ سے بدنام ہے۔

This phrase means that he is widely known in a negative way because of his involvement in criminal activities.

Explanation

I am scared of heights.

میں بلندیوں سے ڈرتا ہوں۔

This phrase is used to express fear or anxiety regarding something, in this case, heights.

Explanation

The correct punctuation is "History, it has been said, is the essence of innumerable biographies."

Commas are needed to set off the clause "it has been said."

Explanation

The cake was shared between Ali and Hyder.

علی اور حیدر کے درمیان کیک تقسیم کیا گیا۔Between is used when referring to two people or things, in this case, Ali and Hyder.

Among is used for more than two people or things.

Explanation

"Deals in" is the correct phrase used when someone is engaged in a trade or business.

Explanation

"Agitate for" is the correct phrase to describe actively protesting for something.