Tech Notes

Topic & Why It Matters

Sentence Completion questions give you incomplete sentences and ask you to fill each gap with words from the passage. The questions look simple because there are no answer options, but they punish imprecise reading: one extra word, one wrong plural, or one copied distractor can cost the mark.

This question type matters because it trains the core IELTS Reading habit: match the question paraphrase to the passage, then lift only the exact words required. Strong candidates do not search randomly for keywords; they predict what grammar and meaning the blank requires before they scan.

Knowledge Points

What Sentence Completion tests

Sentence Completion asks you to fill a gap in a sentence using words from the passage. It tests precise locating, paraphrase recognition, and word-limit control. The answer must normally be copied exactly from the passage, not rewritten in your own words.

The word limit is part of the question

Instructions such as NO MORE THAN TWO WORDS AND/OR A NUMBER are strict. A correct idea with too many words is marked wrong. Count hyphenated compounds as one word, and remember that a number such as 15 or fifteen counts as one item.

Grammar predicts the answer type

Before scanning, use the sentence around the gap to predict whether the answer must be a noun, adjective, verb phrase, number, or noun phrase. This prevents you from copying a nearby word that has the right topic but the wrong grammar.

The question paraphrases the passage

The sentence in the question rarely repeats the passage exactly. Expect paraphrases such as reduce → cut, was built to → designed for, difficult to maintain → hard to keep working. Your job is to match meaning first, then lift the exact answer words.

Answers usually follow passage order

In a set of Sentence Completion questions, the answers usually appear in the same order as the questions. After you answer Question 2, begin searching after that answer window for Question 3 unless the task clearly signals otherwise.

Step-by-Step Strategy

Read the instruction line first

Underline the word limit. Decide whether numbers are allowed. Keep the limit visible while answering so you do not lose marks for a technically invalid response.

Predict the gap grammar

Look at the words before and after the blank. Decide whether the answer should be a singular noun, plural noun, adjective, amount, place, material, or short noun phrase.

Find the keyword and its paraphrase

Use stable words from the question, especially technical nouns and dates, to locate the answer window. Be ready for synonyms rather than identical wording.

Read the full sentence in the passage

Do not copy the first nearby word. Read the whole passage sentence and confirm that the idea matches the question sentence.

Lift the exact words

Copy only the words needed to complete the question grammatically. Do not change word form unless the question explicitly allows it.

Check meaning, grammar, and limit

Read the completed question sentence aloud in your head. It must be grammatical, match the passage, and obey the word limit.

Common Pitfalls

Mistake	Corrective Rule
Writing your own paraphrase instead of passage words	For completion tasks, the safe answer is the exact passage wording. Use paraphrase only to locate the answer, not to rewrite it.
Breaking the word limit	If the limit is two words, three words are wrong even when the meaning is correct. Remove articles such as a, an, and the unless they are necessary.
Copying a nearby keyword	A repeated topic word is not automatically the answer. Check that it fits the gap grammar and completes the question meaning.
Ignoring singular and plural forms	If the passage answer is plural, copy the plural. IELTS marking is strict when the number changes meaning or grammar.
Stopping at the first possible answer	Read until the sentence meaning is fully confirmed. Some passages mention an old approach first and the correct current approach later.

Vocabulary & Signpost Bank

Expression / Signal	What It Means for Your Strategy
known as / called / referred to as	Often introduces a name, label, or technical term
designed to / intended to / used to	The gap may ask for a purpose or function
made from / composed of / built with	Expect a material or component noun phrase
reduced / lowered / cut	The question may paraphrase a decrease in cost, time, risk, or waste
because / due to / as a result of	The missing phrase may be a cause or condition
rather than / instead of	Check whether the answer is the accepted idea or the rejected alternative
requires / depends on / relies on	Look for a necessary resource, condition, or process
temporary / permanent / seasonal	Time-status adjectives are common completion answers

Practice Passage & Questions

Complete the sentences below. Choose NO MORE THAN TWO WORDS from the passage for each answer. Click Check Answers to see model answers with exact passage references.

Passive Storage in Small Museums~376 words

Across northern Europe, several museums are experimenting with low-energy storage rooms for fragile objects. Traditional climate control keeps galleries and archives at a narrow temperature and humidity level throughout the year. This protects paper, textiles, and wooden artefacts, but it also requires large amounts of electricity. Smaller museums, especially those in historic buildings, often struggle to afford these systems or to install modern ducts without damaging the structure.

One alternative is passive storage, a method that uses the building itself to slow environmental change. Thick walls, shaded windows, and carefully sealed doors reduce sudden shifts in air temperature. Instead of forcing every room to stay at the same level, conservators define a safe range and allow conditions to move gradually within it. This approach is most effective for objects that are not frequently handled or displayed.

The Museum of Coastal Trade in Denmark adopted passive storage after an energy audit showed that its archive consumed more power than its exhibition halls. Engineers first insulated the roof with wood-fibre panels, a material chosen because it absorbs and releases moisture slowly. They then moved the most delicate maps into an interior room with no external wall. Over the following winter, sensors recorded fewer humidity peaks, even though the heating system was used less often.

Passive storage is not a universal solution. Metal objects may still need special protection against corrosion, and mixed collections can be difficult because different materials respond to moisture in different ways. Staff also need regular training, since a door left open during a storm can undo weeks of careful planning. For this reason, many museums combine passive design with targeted mechanical support, such as small dehumidifiers placed near vulnerable objects.

Despite these limits, conservation specialists see passive storage as a useful middle path. It can lower energy bills while avoiding the risks of abandoning environmental control altogether. Perhaps more importantly, it encourages museum staff to understand how their buildings behave, rather than treating climate control as a machine hidden behind the walls.

Questions 1-6. Complete the sentences using words from the passage.

NO MORE THAN TWO WORDS

1.Traditional climate-control systems use a lot of electricity because they keep storage spaces within a narrow range of temperature and __________.

Answer:

2.Passive storage relies partly on the __________ to reduce rapid environmental changes.

Answer:

3.In passive storage, conservators allow conditions to change slowly inside a safe __________.

Answer:

4.At the Danish museum, the archive used more energy than the __________.

Answer:

5.Engineers insulated the roof with __________ because this material manages moisture gradually.

Answer:

6.Some museums use small __________ near fragile items as targeted mechanical support.

Answer:

Self-Check

Answer these from memory. If you cannot answer all three, re-read the relevant section.

Why should you predict the grammar of the blank before scanning the passage?
What should you do when the question sentence paraphrases the passage sentence?
Why can an answer with the correct idea still be marked wrong in Sentence Completion?

Answers:

(1) Grammar prediction tells you whether to look for a noun, adjective, number, or phrase, so you do not copy a nearby word that has the right topic but cannot fit the sentence.
(2) Use the paraphrase to locate the answer window, then copy the exact words from the passage that complete the question sentence.
(3) It may break the word limit, use your own wording instead of passage wording, have the wrong singular/plural form, or fail to complete the sentence grammatically.