Sentence rearrangement (PQRS): Form a clear statement beginning with 'Little...' to show surprise that he had been let down by a colleague he had supported for years; pick the correct sequence.

Given data

• Starter: 'Little'
• R: did he realise
• P: that he had been let down
• S: by a colleague whom he had
• Q: stood by all these years

Concept/Approach
Inversions with 'Little' require auxiliary before subject ('did he realise'). Then follow with a 'that'-clause and complete the relative clause describing the colleague.

Step-by-step reconstruction
Structure: 'Little did he realise that he had been let down by a colleague whom he had stood by all these years.'Sequence: RPSQ.

Verification
Grammar (inversion) and semantics (betrayal by long-supported colleague) align correctly.

Common pitfalls
Starting with P ignores inversion; placing Q before S produces a dangling relative pronoun.

Final Answer
Correct order: RPSQ.