■ Preface
■ Table of Contents
■ Structure and features of this book
■ All about DET
■ DET vs TOEFL vs IELTS
■ How to prepare for the exam
■ Study Plan

SECTION 1: Read and Select
Question Type 1 Read and Select

SECTION 2: Fill in the Blanks
Question Type 2 Fill in the Blanks

SECTION 3: Mixed Language Skills
Question Type 3 Listen and Type
Question Type 4 Read and Complete

SECTION 4: Interactive Reading
Question Type 5 Interactive Reading

SECTION 5: Interactive Listening
Question Type 6 Interactive Listening

SECTION 6: Writing
Question Type 7 Write About the Photo
Question Type 8 Interactive Writing

SECTION 7: Speaking
Question Type 9 Speak About the Photo
Question Type 10 Read, Then Speak
Question Type 11 Interactive Speaking

SECTION 8: Writing & Speaking Sample
Question Type 12 Writing Sample
Question Type 13 Speaking Sample

supplement
■ 1000 DET Vocabulary Questions
■ [Mock Test PDF / Audio MP3] Access lab.siwonschool.com ▶ Click Textbook/MP3 tab ▶ Search for the book ▶ Download

★ Structure and features of this book

01.
All about the exam
ㆍ Clear understanding of the exam: The official DET guide published by Duolingo is explained clearly and easily.
ㆍ A to Z about the Duolingo English Test: Provides all information related to the test, including the test format, precautions, and how to prepare for the test.

02.
Complete mastery of problem types
ㆍ Complete analysis of all problem types, including Interactive Speaking: Each chapter provides an introduction to each problem type, progress order, solution strategies, key points, and study tips.
ㆍ Provides modified questions from previous exams: Provides practice questions based on questions from actual exams, providing a sense of the exam's essence.

03.
Mock exam reflecting past questions
ㆍMock exam questions with the same structure and difficulty as the actual exam, as of the latest revision in 2025
ㆍProvides interpretation and vocabulary organization for quick review of mock exams.

04. Provides DET vocabulary from past exams
ㆍ 1,000 vocabulary words that appear repeatedly in actual DET exams are carefully selected and provided in alphabetical order (audio sources are also provided).
ㆍProvides definitions of words that are used in actual DET exams and are actually used in the United States among the various meanings of words.

05.
A complete, easy-to-follow study plan
ㆍ 20-day completion for beginners: Even beginners or learners with limited English skills can complete the book in 20 days by following the 20-day study plan.
ㆍ Ultra-fast 7-day completion: If you are a test taker with a certain level of confidence in English, apply the ultra-fast one-week completion study plan.

★ Learners who need this book

? All learners, from beginners to high-score test takers, can take the Duolingo test.