Para completion asks a deceptively narrow question: of these four sentences, which one does the paragraph actually want next? Three of them will be true, relevant, even well written — and still wrong, because they relate to the topic without continuing the thought. The right ending flows from the last line with no jolt, lands the point the paragraph was building toward, and keeps the same tone and scope. This cheat sheet turns that into concrete moves: read the last line hardest, maintain the thread, follow the contrast, close the open loop, and eliminate the new-topic, contradiction and over-generalisation traps. Every box carries a worked mini-example, and since this is usually an MCQ with negative marking, accuracy is the whole game here. It sits alongside the rest of Optima Learn's CAT preparation; once you're timing full sets, check where you stand with the CAT score predictor.
1What Para Completion Tests
Pick the sentence that continues the paragraph, not one that merely relates to it.
Best completion = the natural next line — same idea, same direction, same tone.
Example: A para building toward "so regulation must adapt" wants that adaptation stated — not a new fact about the industry. Answer: the option that lands the para's own point.
CAT Insight: it's an MCQ with negative marking — you pick the best continuation of four, so accuracy beats speed.
2Read the Last Line Hardest
The completion attaches to the final sentence — its direction decides everything.
The last line sets the trajectory; the answer must extend it, not swerve.
Example: Last line: "But this optimism ignored one fact." The completion must state that fact. Answer: the option naming the overlooked fact.
CAT Hack: read the last sentence twice before you even glance at the options.
3Maintain the Flow of Thought
The right ending continues the same thread; it doesn't open a new one.
Continuation, not introduction — no fresh subject in the final line.
Example: A para on why cities flood ends mid-argument; the completion adds the next reason, not a switch to drought. Answer: the on-thread option.
Common Mistake: choosing a true, interesting sentence that starts a different discussion.
4Land the Conclusion the Para Builds
If the paragraph argues toward a point, the completion states it.
Premises stack toward one conclusion — the answer is that conclusion.
Example: Costs fell, demand rose, rivals exited → completion: "so the firm now dominates the segment." Answer: the option that closes the logic.
CAT Hack: ask "and therefore…?" after the last line — the answer usually finishes that sentence.
5Continue the Contrast or Concession
A last line that sets up "but / although" must be resolved the right way.
After a concession, the completion carries the main point, not the concession.
Example: "Although the scheme looked sound…" → the completion states why it wasn't. Answer: the option delivering the failure.
CAT Insight: the completion often lives on the far side of the last contrast word.
6Follow the Keyword & Pronoun Thread
The ending picks up the terms the paragraph has been developing.
Repeated nouns and "this / these / such" glue the completion to the para.
Example: A para develops "informal labour"; the completion says "this workforce…", not a new group. Answer: the option that continues the referent.
CAT Favourite: a completion that reuses the para's key noun in the same sense is usually the right one.
7Preserve Tone & Stance
The completion keeps the author's attitude — critical stays critical.
Match stance, not just topic; a tone flip breaks the paragraph.
Example: A skeptical para on AI hype meets a triumphant closing line — the tone clashes. Answer: the skeptical completion.
Common Mistake: an ending that's factually fine but tonally off.
8Reject the New-Topic Option
An option that introduces a fresh idea can't complete the paragraph.
A new subject in the final line means it's out.
Example: A para on monetary policy meets an option about fiscal deficits — a new topic. Answer: eliminate it; stay on monetary policy.
CAT Hack: flag any noun in the option that never appeared in the para — new nouns are suspects.
9Reject the Contradiction
An ending that reverses what the paragraph established is wrong.
The completion agrees with the para's direction, never against it.
Example: A para argues subsidies helped; an option concludes they failed. A reversal, so out. Answer: the option consistent with the para.
Common Mistake: picking a strong-sounding line that quietly negates the para's claim.
10Reject the Over-Generalisation
An ending that zooms out to grand claims usually overshoots.
Scope match — the completion stays at the paragraph's level.
Example: A para on one city's transit ends with "…and thus humanity's future is urban." Too broad. Answer: the city-scoped option.
CAT Insight: the sweeping "civilisation / humanity" close is a classic trap ending.
11Close the Open Loop
The paragraph often leaves a tension; the completion resolves it.
Find the unanswered question the para raised — the ending answers it.
Example: A para builds a puzzle — "why did output fall despite investment?" The completion offers the resolution. Answer: the option that answers the puzzle.
CAT Hack: if the para poses a question, the completion is its answer, not a fresh question.
12Don't Add Premature Detail
The ending shouldn't dive into a detail the para wasn't heading toward.
A completion generalises or concludes; it rarely drops a random specific.
Example: A para summarising a debate ends with an option citing one obscure 1997 statistic. Answer: the concluding option, not the stray data point.
Common Mistake: mistaking a specific-sounding option for the "precise" answer.
13Setup Wants a Payoff
If the paragraph is a setup, the ending must be the payoff it promised.
Problem → solution, claim → implication, story → point.
Example: A para narrates a failed product launch; the completion draws the lesson, not more narration. Answer: the lesson option.
CAT Favourite: CAT loves a build-up whose obvious payoff is dressed up as the plainest-looking option.
14Eliminate, Then Read It Back
Down to two? Read the whole paragraph with each ending and hear the seam.
The right completion leaves no jolt when the paragraph is read in full.
Example: Ending A leaves a "this" with no referent; ending B flows clean. Answer: B, the seamless read.
CAT Hack: the full read-through is the safest final test before you lock in an answer.
Para completion is won by reading the last line the way the author meant it, then refusing every ending that relates without continuing. Drill this sheet by naming, for each wrong option, which trap it was — new topic, contradiction, over-reach, tone flip — and the correct choice starts to feel obvious. For more VARC guides, browse the Optima Learn blog or explore every study guide, and work through the full CAT exam hub for section-wise strategy. When you want structured, mentor-led prep, the team at Optima Learn can map out your plan — book a free CAT 2026 call and line up your next few weeks.