TOEFL Reading · 2026 Guide

TOEFL Complete the Words: Format, Examples, and Strategies

The updated TOEFL iBT Reading section introduces a task many test takers find unfamiliar: Complete the Words. This guide explains how the task works, what makes it different from standard cloze exercises, and how to prepare effectively.

Based on officially described TOEFL task design research · By the LingoLeap Research Team

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What is TOEFL Complete the Words?

TOEFL Complete the Words is a reading task based on the C-test format. Test takers read a short paragraph (70–100 words) where 10 words have their second half removed. The first sentence stays intact, and students restore the missing letters using grammar and context clues. The deletion pattern follows a fixed rule rather than manual blank selection.

What Is TOEFL Complete the Words?

The TOEFL Reading section in the updated TOEFL iBT includes a task called Complete the Words. Students read a short academic-style paragraph where several words appear partially truncated. The goal is to restore the missing letters and reconstruct the original words.

This task is designed for all TOEFL test takers, regardless of proficiency level. It appears alongside other new TOEFL reading question types in the 2026 exam format.

Skills tested

Vocabulary knowledge and word recognition
Grammar awareness (tense, agreement, word forms)
Word formation and morphology
Contextual understanding across sentences

TOEFL Complete the Words Format

According to the ETS TOEFL iBT Technical Manual, each Complete the Words item follows a standardized format. Here is a summary of the key parameters:

Parameter	Detail
Section	TOEFL iBT Reading
Task type	C-test (Complete the Words)
Passage length	70–100 words
Number of truncated words	10
Skills tested	Vocabulary, grammar, word formation, context
Best solving approach	Read for overall meaning, then use grammar and context clues to restore each word

How the Task Works

Many students assume blanks are chosen by test writers. However, the TOEFL Complete the Words task uses a C-test deletion algorithm to generate the truncated words. Understanding this pattern helps you predict where blanks appear and solve them faster.

Rule 1: The first sentence is intact

The paragraph begins with a complete sentence that provides context before any truncated words appear.

“A calendar is a system for organizing time into units such as days and months.”

Rule 2: Every second word is partially deleted

Starting from the second sentence, the passage follows an alternating pattern. Only the second half of each targeted word is removed.

Word position	Action
1st word	Kept intact
2nd word	Second half removed
3rd word	Kept intact
4th word	Second half removed

The deletion rule is mechanical and position-based. Even very short words can be truncated if they fall in the target position. See the full example below.

Example: How Complete the Words Looks on the Test

Here is a walkthrough showing the original text, the truncated test version, and why each answer is correct.

1. Original passage

A calendar is a system for organizing time into units such as days and months. Early calendars often used observations of the Moon because its phases repeat in a regular cycle.

2. Test version (truncated)

A calendar is a system for organizing time into units such as days and months.

Early calen_____ often used obser_____ of the Moon because its pha_____ repeat in a regu_____ cycle.

3. Correct answers with explanation

calen_____

calendars

Plural noun matching 'Early ___ often used...'

obser_____

observations

Noun form required after 'used'; context = Moon

pha_____

phases

Plural noun; 'phases repeat' fits grammatically

regu_____

regular

Adjective modifying 'cycle'; context = repeating

Why Some Practice Questions Look Different

Students sometimes notice that practice materials found online do not follow the same pattern as the real TOEFL. There are several reasons — and recognizing them helps you choose better study resources.

Manual blank selection

Some materials insert blanks manually rather than using the C-test deletion rule. This turns the exercise into a traditional cloze test, which does not reflect the TOEFL design.

Blanks concentrated in one sentence

Official C-tests distribute truncated words across the paragraph. If most blanks appear in a single sentence, the item likely does not follow the authentic pattern.

No short-word truncations

The ETS documentation does not specify a minimum word length. Authentic materials may include very short truncated forms (e.g., "i_" → "is") because the rule is mechanical and position-based.

When choosing TOEFL practice tests, look for materials that follow the C-test structure: intact first sentence, alternating deletions, and 10 truncated words across the passage.

Strategies to Solve Complete the Words Faster

These TOEFL reading strategies will help you approach Complete the Words questions with more speed and confidence.

Read the entire paragraph first

Understand the overall topic before attempting any blanks. The first intact sentence provides critical context that narrows down possible answers.

Use grammar clues

Look for signals such as plural markers (-s), verb tenses (-ed, -ing), and adjective forms (-al, -ful). Example: 'season_____ tasks' → 'seasonal' (adjective form).

Confirm meaning in context

Always check that your restored word fits both the grammar and the meaning of the sentence. A word that is grammatically correct but semantically wrong will cost you points.

Work through the passage in order

Earlier answers often provide context clues for later ones. Solving blanks sequentially builds a clearer picture of the passage's meaning.

Watch for word families

If you recognize the word root, think about common derivations: observe → observation, observations; regulate → regular, regulation. This speeds up restoration significantly.

Skip and return

If a word is difficult, move on. Completing easier blanks often reveals enough context to solve the harder ones when you come back.

Practice Complete the Words Questions

Build speed and accuracy with realistic C-test exercises. LingoLeap follows the officially described deletion rule so every practice passage matches real TOEFL design.

Practice Complete the Words

Common Mistakes in TOEFL Complete the Words

Even well-prepared students fall into these traps. Knowing them in advance gives you an edge on test day.

Ignoring the first sentence

The intact first sentence sets the topic. Skipping it means you lose your strongest context clue.

Guessing without checking grammar

A word might seem right by meaning but be the wrong form. Always verify tense, number, and part of speech — "observe" vs. "observations."

Assuming blanks are random

The deletion pattern is systematic. Once you recognize the alternating rule, you can anticipate which words are affected.

Spending too long on one blank

Move forward and return. Later context often reveals earlier answers, and time management matters in the TOEFL Reading section.

Practicing with non-authentic materials

If your practice tests use random blank placement or full-word deletions, they are training a different skill. Use materials that follow the C-test format.

How to Practice TOEFL Complete the Words Effectively

Building a consistent practice routine is the fastest way to improve. Here is a practical approach:

Timed practice

Set a timer when solving Complete the Words passages. Aim to finish each 10-blank paragraph within 3–4 minutes, simulating real test pacing.

Context clue analysis

After each practice passage, review which context clues helped you — and which you missed. Train yourself to spot grammatical signals and semantic patterns faster.

Vocabulary building

Expand your academic vocabulary by reading articles on science, history, and social topics. Pay attention to word families and common suffixes like -tion, -ment, -ous, -ive.

Grammar review

Brush up on verb tenses, subject-verb agreement, and word formation rules. These are the grammar patterns that appear most often in Complete the Words tasks.

Use authentic materials

Choose practice resources that follow the C-test deletion rule — intact first sentence, alternating word deletions, and 10 truncated words per passage.

LingoLeap offers Complete the Words exercises that follow the officially described task design, with instant AI-powered feedback to help you identify patterns and improve faster.

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Frequently Asked Questions

Is TOEFL Complete the Words a cloze test?

No. Unlike traditional cloze tests where blanks are selected manually, TOEFL Complete the Words uses a C-test deletion algorithm. The second half of every second word is removed starting from the second sentence, following a fixed mechanical rule rather than subjective blank placement.

How many blanks appear in a Complete the Words passage?

Each Complete the Words passage includes exactly 10 truncated words. The paragraph is typically 70–100 words long, with the first sentence left fully intact.

How long is the Complete the Words paragraph?

The passage is typically 70 to 100 words. It forms a single coherent meaning unit on an academic or general topic.

Why does TOEFL use the C-test format?

C-tests are a well-researched method for measuring overall language competence. They test vocabulary, grammar, and contextual understanding simultaneously, making them an efficient and reliable assessment tool.

Can very short words be truncated in Complete the Words?

Yes. The deletion rule is mechanical and based on word position, not word length. Official examples include very short truncated forms such as "i_" for "is." There is no documented minimum word length.

How should I practice for Complete the Words?

Focus on timed reading practice, expanding academic vocabulary, and reviewing grammar patterns like verb tense, plurals, and word formation. Use practice materials that follow the authentic C-test deletion rule rather than random blank placement.