DET
DET reading task guide

DET Read and Complete practice

Read and Complete removes letters from several words in one passage. The surrounding sentence and the passage topic both matter.

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Current format

What happens in Read and Complete

Restore missing letters across a passage using vocabulary, grammar, and context.

The task is also described as C-test in DET research and learning materials. PrepEx keeps the current on-screen task name as the canonical label.

Frequency3–6 passagesCurrent official test structure.
Time3 minutes eachPractise with the real constraint.
ScoringEach unfinished word is evaluatedPrepEx reports practice evidence only.
A repeatable method

Use one job for each part of the timer

  • Read once for the topic before filling every gap.
  • Complete the clearest words first so they add context for harder gaps.
  • Reread the finished passage for grammar, spelling, and meaning.
Practise the format, then review the decision

After each PrepEx attempt, identify the first point where your response went off track. A specific correction is more useful than simply repeating the same item.

Open Read and Complete practice.

Common mistakes

What to catch during review

  • Solving each gap without reading the surrounding passage
  • Forcing the first word that matches the visible letters
  • Missing endings that control tense, number, or word class
  • Leaving completed words unchecked even when the sentence sounds wrong
Scoring boundary

PrepEx feedback is practice evidence

Read and Complete contributes evidence under the official DET scoring system. PrepEx can help you check task execution and track practice performance, but it does not reproduce Duolingo's live adaptive selector, operational item bank, proctoring, or scoring model.

Any number shown after a PrepEx attempt is a practice estimate, not an official DET score.

Official source

Confirm the live task rules before test day

Read the official Read and Complete Help Center page and the current DET Test Structure. Duolingo's live Help Center is the final authority if a task count, timer, or rule changes.

Format facts rechecked September 1, 2026. PrepEx examples and practice content are original and independent.

DET Reading practiceCompare every current reading task family. All DET task typesCheck the timing and scoring approach for all 13 families. DET formatSee where the task fits into the current test flow. DET scoringSeparate official reporting from PrepEx practice estimates.
PrepEx provides independent DET preparation. PrepEx practice estimates are not official Duolingo English Test scores or results.