The speaker is uncertain about the identity of the person. 'Might be' expresses possibility or uncertainty fitting the context.

'For ten years' indicates a period from the past continuing to now. The present perfect 'have known' is used with stative verbs like 'know' for such duration.

'Swirls through' means to move in a twisting pattern within an area. 'Through' best captures the movement of snow filling and moving within the entire valley.

'Across the street' means on the other side of the street. This is the most idiomatic expression.

When reporting verb is present perfect the reported speech tense may not change for future events. 'Said to' becomes 'told'. Pronouns change correctly in option (b).

Option (a) correctly uses preposition 'by' followed by gerund phrase 'switching off...' to show the method or means of action.

This is a third conditional using the inverted form 'Had + subject + past participle...could have + past participle'. Option (a) uses this structure correctly.

The correct structure is 'on both the sides' or 'on both sides'. 'Either' should use singular noun. 'The both' is incorrect. Option (b) is the most accepted form.

'Boisterous' means noisy energetic and cheerful. Its direct opposite is 'quiet' or calm.

Plagiarism is the practice of taking someone else's work or ideas and passing them off as one's own. It is a form of literary theft.

Charles Dickens's 'A Tale of Two Cities' is set in London and Paris before and during the French Revolution.

This famous line is spoken by Prince Hamlet in Act 1 Scene 2 of Shakespeare's 'Hamlet' in a soliloquy expressing his disgust at his mother's hasty marriage.

Samuel Johnson published 'A Dictionary of the English Language' in 1755. It was one of the most influential dictionaries in the history of English.

Sonnet Ballad and Epic are specific forms of poetry. A 'tale' is a general term for a story which can be prose or verse but is not itself a specific poetic form.

This line is spoken by King Lear in Act 3 Scene 2 of Shakespeare's tragedy 'King Lear' as he rages against the storm feeling that injustices done to him outweigh his own faults.

The ideals of liberty equality and fraternity from the French Revolution (1789) deeply influenced the Romantic poets shaping their emphasis on individualism emotion and nature.

'A Farewell to Arms' (1929) is a novel by American writer Ernest Hemingway set during the Italian campaign of World War I.

Jonathan Swift is widely regarded as the foremost satirist in English literature best known for 'Gulliver's Travels' and 'A Modest Proposal'.

The Elizabethan Age (late 16th to early 17th century) is called the Golden Age because of the flourishing of literature especially drama with Shakespeare and Marlowe.

'The Ministry of Utmost Happiness' (2017) was written by Indian author Arundhati Roy. The other novels are by Hardy (British) Achebe (Nigerian) and Conrad (Polish-British).