Explanation

“A wild goose chase” means a foolish and hopeless search for or pursuit of something unattainable.

It refers to an endeavor that is unlikely to succeed or achieve its goal.

It often involving a lot of effort with little chance of success.

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

Nefarious means برائی

Evil means برائی

Explanation

Fungal: فنگس (کھمبی یا پھپھوندی) سے متعلق

Sterile جراثیم سے پاک

Explanation

The phrase "eager beaver" refers to a person who is very enthusiastic and diligent

Explanation

Sojourn means قیام

Stay means قیام

Explanation

Impediment means رکاوٹ

Obstacle means رکاوٹ

Explanation

Robust means مضبوط

Frail means کمزور

Explanation

The Winner Stands Alone is not a novel by Thomas Hardy; it was written by Brazilian author Paulo Coelho.

Thomas Hardy is known for works like The Return of the Native, Tess of the D'Urbervilles, and Under the Greenwood Tree.

Explanation

In passive voice, "She will have sung a song" becomes "A song will have been sung by her."

Passive voice changes the focus from the subject to the object.