Sentence Completion is one of the most common IELTS Reading question types. It tests your ability to locate specific information and complete a sentence using words from the passage.

Many students lose marks in this task because they:

If you want to reach Band 7 in IELTS Reading, mastering Sentence Completion questions is essential.

This guide explains exactly how to solve IELTS Sentence Completion questions step by step.

Need a simpler explanation?

🎓IELTS Sentence Completion: Quick Answer

To solve Sentence Completion questions efficiently:

The correct answer must come directly from the passage.

🧠What Are Sentence Completion Questions?

In this question type, you must complete a sentence using words from the reading passage.

Example instruction:

Complete the sentences below. Choose NO MORE THAN TWO WORDS from the passage.

Example question:

The experiment showed that increased sunlight improves ______ growth.

Your task is to locate the correct word(s) in the passage.

🎯Where Sentence Completion Appears in IELTS Reading

Sentence Completion questions appear in both IELTS Academic and General Reading tests.

They often appear in:

If you want to understand how the two test versions differ, see:

🏅Sentence Completion vs Matching Sentence Endings

Students often confuse these two question types.

Question Type

What You Do

Sentence Completion

Write missing words from the passage

Matching Sentence Endings

Choose an ending from a list

For strategies on sentence endings questions, see:

💡Step-by-Step Strategy for Sentence Completion

Follow this six-step method.

💼Step 1: Read the Sentence Carefully

Start by reading the incomplete sentence.

Example:

The main cause of coral reef damage is ______.

This tells you what type of information to look for.

💼Step 2: Identify Keywords

Underline or remember the important words.

Example keywords:

These keywords help you scan the passage quickly.

💼Step 3: Identify the Type of Missing Word

Look at the grammar of the sentence to determine what type of word is missing.

Example:

The main cause of coral reef damage is ______.

Possible answer type:

noun phrase

Understanding grammar helps narrow down the correct answer.

💼Step 4: Scan the Passage

Search the passage for keywords or synonyms.

Example:

IELTS often uses paraphrasing, so identical wording is rare.

💼Step 5: Locate the Exact Words

The answer must usually be copied directly from the passage.

Example passage sentence:

Pollution is the main cause of coral reef destruction.

Correct answer:

pollution

💼Step 6: Check the Word Limit

Always follow the instruction.

Example instructions:

If the instruction says two words maximum, writing three words will be marked incorrect.

🏅Example IELTS Sentence Completion Question

👉Passage Excerpt

Many scientists believe that habitat destruction is the primary cause of declining animal populations.

👉Question

The main cause of declining animal populations is ______.

👉Correct Answer

habitat destruction

Explanation:

The passage clearly states that habitat destruction is the primary cause.

⚡Common Mistakes in Sentence Completion

Many students lose marks due to avoidable errors.

💼Mistake 1: Exceeding the Word Limit

If the instruction says NO MORE THAN TWO WORDS, writing three words will result in zero marks.

Always double-check the word count.

💼Mistake 2: Changing the Words

The answer must usually come exactly from the passage.

Incorrect:

habitat destruction → destroying habitats

Changing the wording can lead to incorrect answers.

💼Mistake 3: Ignoring Grammar

The completed sentence must be grammatically correct.

Example:

Incorrect:

The main cause of coral reef damage is destroy.

Correct:

The main cause of coral reef damage is destruction.

🏅Advanced Tip: Answers Usually Appear in Order

In most IELTS Reading tests, Sentence Completion answers appear in the same order as the passage.

This means:

Question 1 → earlier in the passage Question 2 → later in the passage

This helps you locate answers more quickly.

💡Time Management for Sentence Completion

Suggested timing:

Try to complete the entire section within 4 minutes.

More timing strategies are explained here:

🔥Other Important IELTS Reading Question Types

To achieve Band 7 or higher, you must understand all IELTS Reading question formats.

These include:

Examples:

🚀Frequently Asked Questions

💼How many Sentence Completion questions appear in IELTS Reading?

Usually 3–6 questions, depending on the passage.

💼Can I use my own words in Sentence Completion?

No. The answer must usually come directly from the passage.

💼Do answers appear in order in the passage?

Yes. In most cases, Sentence Completion answers appear in the same order as the passage.

💼What is the biggest mistake students make?

The most common mistake is exceeding the word limit or choosing words that do not fit the sentence grammar.

💼What band score requires strong Sentence Completion accuracy?

To reach Band 7 in IELTS Reading, you usually need around 30 correct answers out of 40, so accuracy in Sentence Completion questions is important.

💡Improve Your IELTS Reading Score Faster

Many students practice IELTS Reading passages but do not analyse why answers are correct or incorrect.

A structured preparation system can help you:

Estimate your reading band score here:

(Internal link placeholder: /tools/ielts-reading-band-score-calculator)