IELTS Reading: Sentence and Summary Completion Without Losing Marks

The most generous task on the paper

Completion questions have a property no other Reading task shares: the question itself tells you a great deal about the answer before you have found it. The gap sits inside a sentence, and that sentence has grammar. Grammar constrains what can fill the gap — a noun, a plural noun, an adjective, a number — and that constraint eliminates most of the passage before you start reading.

Candidates who use this finish completion sets quickly and accurately. Candidates who ignore it scan for keywords, find something that looks related, and write it in without checking whether it fits. The second approach produces answers that are recognisably close and still worth zero.

Two tasks, one method, one important difference

Sentence completion gives you a set of separate sentences, each with a gap, each summarising a different point from the passage. The sentences follow passage order.

Summary completion gives you a continuous paragraph that condenses part of the passage — sometimes the whole thing, more often one or two sections — with several gaps in it. Because it is continuous prose, it has its own internal logic as well as a relationship to the passage.

The crucial difference is the source of the answers.

Without a word bank, you take words directly from the passage. Copy them exactly as they appear; you may not change the form. If the passage says migration and your gap needs a verb, you have the wrong part of the passage, not a word to convert.

With a word bank — a lettered list of options, usually more options than gaps — the answers do not appear in the passage in those words. They are paraphrases. Scanning for them wastes time, because they are not there.

The instruction line tells you which version you have. Read it. The methods diverge completely from that point.

Predict the grammar before you read the passage

This is the step that makes the task fast. For each gap, decide what kind of word must go in it. You are reading the question sentence, not the passage.

Look at what sits either side of the gap.

After an article or a determiner — a, an, the, this, their, each — you need a noun, or an adjective followed by a noun.

After a preposition — in, of, for, by, through — you need a noun or a gerund.

After a modal or an auxiliary — can, must, should, has been — you need a verb, and the auxiliary tells you which form.

Before a noun you need an adjective or a noun modifier.

After a number or a quantifier — several, many, two — you need a plural noun.

Also decide singular or plural, because this decides marks on its own. "Researchers measured the ... of each sample" wants a singular or uncountable noun. "The report lists three main ..." wants a plural.

Write your prediction next to the gap: pl. noun, adj, verb -ing. It takes three seconds per gap and it turns the search from "find something about this topic" into "find a plural noun about this topic", which is a far smaller haystack.

The word limit decides more answers than you expect

NO MORE THAN TWO WORDS FROM THE PASSAGE. ONE WORD ONLY. NO MORE THAN THREE WORDS AND/OR A NUMBER.

Exceeding the limit makes a correct answer wrong, with no partial credit. Two things follow.

First, the limit is a hint about the answer's shape. If the instruction allows three words and the gap comes after the, you are probably looking for a compound noun phrase, not a single word. If it says one word only, you are looking for a single word and any two-word phrase you find is the wrong candidate.

Second, hyphenated words count as one, and numbers written as figures count as a number rather than a word. Under TWO WORDS AND/OR A NUMBER, "1200 participants" fits.

Do not add words to make the sentence read better. If the exact phrase from the passage produces slightly clumsy English in the gap, that is normal. The answer key wants the passage's words, not your improvement of them.

Finding the answer in the passage

Completion questions follow passage order, which is the single most useful navigational fact about them. Question 27's answer sits after question 26's and before question 28's. Once you have found one answer, you have bounded the search for the next.

Search for the idea, not the words. The question sentence paraphrases the passage, so the words you are scanning for are usually not the words that are printed. What is often preserved, though, are the things paraphrase cannot easily change: numbers, dates, proper nouns, technical terms, capitalised words. Anchor your scan on those.

When you locate the region, read the full sentence in the passage and the one before it. Then check your candidate answer three ways:

• Does it fit the grammar you predicted? If you predicted a plural noun and found a verb, you are in the wrong place or you have identified the wrong word.
• Does it fit the meaning? Read the completed question sentence aloud in your head. It should say something the passage actually says.
• Is it within the word limit?

If all three pass, write it and move on.

The word-bank variant needs the opposite instinct

When a lettered list of options is provided, everything changes. The options are paraphrases, so scanning for them in the passage fails. Instead:

Group the options by word class first. Sort them into nouns, verbs and adjectives before you look at any gap. Now, when your grammar prediction says "adjective", you have three candidates rather than twelve.

Read the summary paragraph as English first. Because it is continuous prose, several gaps can often be narrowed by internal logic alone — a contrast marker before a gap means the answer opposes what came before, a therefore means it follows from it.

Expect more options than gaps. The extras are there to catch candidates matching on topic rather than on meaning. Two options will often be near-synonyms with one crucial difference of degree or scope.

Do the easy gaps first, then use elimination. Options are used once. Every gap you fill confidently shrinks the pool for the hard ones.

Where the marks actually go

Wrong form. The passage says analysed; the gap needs analysis. Without a word bank you cannot change the form — so if the form does not fit, you have found a related word rather than the answer. Keep reading; the noun is usually nearby.

Right idea, wrong precision. The gap needs the specific term and you wrote the general one, or vice versa. Completion answers are usually precise, technical, and lifted verbatim.

Copying too much. You found the right region and wrote the whole phrase rather than the part that fits. Re-read the completed sentence: if it now contains a repeated word — "the increase in the increase in temperature" — you copied across a boundary.

Spelling. The word is printed in front of you, which makes a misspelling particularly expensive. Copy letter by letter for anything unfamiliar, and check the copy.

Leaving blanks. There is no negative marking in IELTS Reading. Any answer beats no answer. If you are out of time, fill every gap with a word of the right class from the right region — your grammar prediction tells you what shape to guess.

Fitting completion tasks into the hour

Academic Reading gives you 60 minutes for three passages and 40 questions, with no extra transfer time — answers must be on the answer sheet when time is called. That works out to roughly 20 minutes per passage, and completion sets should be among your faster tasks because the grammar constraint does so much of the work.

A practical order for a passage with mixed task types: do the completion questions before the ones that need whole-passage judgement, such as matching headings or Yes/No/Not Given. Completion answers are localised and ordered, so finding them also maps the passage for you, which makes the harder tasks quicker. The time management guide has the full plan.

A drill that builds the instinct

Take a completion set and do only the prediction step: for every gap, write the word class and whether it is singular or plural. Do not look at the passage at all. Then check against the answer key.

You will be right most of the time, and the exercise takes four minutes rather than twenty. Repeat it across ten sets and the prediction becomes automatic, at which point you are reading the passage with a specific target rather than a vague topic — which is the whole difference between a completion task that takes eight minutes and one that takes three.

The short version

Read the instruction line to find out whether you have a word bank. Predict the word class and number for every gap before you look at the passage. Use passage order and unparaphrasable anchors — numbers, names, technical terms — to locate the region. Copy exactly, respect the limit, never change the form. Check the completed sentence reads as something the passage actually claims. And fill every gap, because a guess constrained by grammar is a real chance at a mark.