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Reading Answer Key Academic Module

Cambridge Book 21 Test 4

The published Reading answers for Cambridge IELTS Book 21 Test 4 are now available below.

Questions
40
Sections
3
Last reviewed

Verified Answers

Reading Passage 1

Questions 1–13
  1. 1 TRUE
  2. 2 FALSE
  3. 3 TRUE
  4. 4 NOT GIVEN
  5. 5 NOT GIVEN
  6. 6 FALSE
  7. 7 TRUE
  8. 8 cow dung
  9. 9 fermentation (process)
  10. 10 pipes
  11. 11 time
  12. 12 money
  13. 13 price

Reading Passage 2

Questions 14–26
  1. 14 I
  2. 15 J
  3. 16 H
  4. 17 B
  5. 18 E
  6. 19 F
  7. 20 NO
  8. 21 NOT GIVEN
  9. 22 YES
  10. 23 NO
  11. 24 C
  12. 25 D
  13. 26 D

Reading Passage 3

Questions 27–40
  1. 27 G
  2. 28 J
  3. 29 I
  4. 30 C
  5. 31 A
  6. 32 E
  7. 33 NO
  8. 34 NOT GIVEN
  9. 35 NOT GIVEN
  10. 36 YES
  11. 37 B
  12. 38 C
  13. 39 D
  14. 40 A

Question Type Breakdown

This Reading test has 40 questions in total: 15 questions testing True/False/Not Given or Yes/No/Not Given statements, 19 questions using multiple-choice, matching-heading, or matching-information formats, and 6 questions requiring sentence, note, table, or summary completion.

How to Use This Answer Key

Mark your attempt against this key only after finishing all three passages within 60 minutes, since partial checking undermines the timing practice needed before the real test. For incorrect answers, re-read only the relevant few lines of the passage rather than the whole section, to build the targeted-scanning skill IELTS Reading actually tests.

Last reviewed on August 4, 2026. See our Editorial Policy for how answer keys are checked and corrected. Spotted a mistake? Tell us.