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English QualifyingPrelims: LowMains: HighInterview: Low10 min readUpdated 2026-05-25

Sentence completion

Sentence completion · fill in the blanks

What is Sentence completion?

Sentence completion, or fill in the blanks, is a question type that gives a sentence with one or two gaps and four or five word options, testing vocabulary applied in context rather than rote synonyms. It carries 15 to 25 marks in the qualifying English paper. Six logic clues decide the answer: contrast, continuation, cause-effect, comparison, example and tone-match.

Story hook

It is March 2025. A candidate sitting for the English qualifying paper reaches the sentence-completion block. She has 15 minutes and 20 questions worth 20 marks. The clock is ticking.

"The minister's response was ___ ; he neither confirmed nor denied the allegations."

(a) candid (b) evasive (c) blunt (d) emphatic

She reads the sentence twice. The logic-clue is "neither confirmed nor denied" — that means evasive. The other three words mean the opposite of evasive (candid = direct, blunt = direct, emphatic = direct). She marks (b). Seven seconds.

The candidate next to her spends 40 seconds, second-guesses, picks candid, and loses the mark. Across 20 questions, the gap widens — she finishes with 18/20; he finishes with 11/20. The 7-mark margin lifts her over the qualifying threshold.

Sentence completion is the single fastest-scoring block in the English qualifying paper. The technique is clue-spotting — identify the logic word in the sentence and match it to the right answer. Twenty seconds per question, 20 marks banked.

Why this matters for UPSC

Sentence completion / fill-in-the-blanks is typically 15-25 marks of the 300-mark qualifying English paper — 15-25 questions, each worth 1 mark, taking 15-25 minutes total. It is the highest marks-per-minute block in the qualifying paper. UPSC values it because it tests vocabulary applied in context — not just rote synonym recall but the judgment of which word fits the surrounding logic.

Master the 6 logic-clue categories + the top 200 contextual vocabulary words, and 5-8% of qualifying total is locked in with two days of focused practice.

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  • Start here (zero knowledge)
  • Flow diagram & mind map
  • Deep dive
  • Real-world connections
  • Memory hooks & mnemonics
  • The Prelims angle
  • The Mains angle
  • The Interview angle
  • Common traps & misconceptions
  • 5-minute revision card
  • Related topics

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