Moles Happy As Homes Go Underground Reading Answers: IELTS Reading Practice Test with Explanation

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Updated on May 04, 2026, 09:35

"Moles Happy as Homes Go Underground" is a Cambridge IELTS 9 Academic Test 4 passage about the growing trend of building underground homes. The passage has seven labelled paragraphs (A–G) and covers 13 questions in total. Question types include True/False/Not Given (Questions 1–7) and sentence completion (Questions 8–13). The passage explores design, history, and practical advantages of earth-sheltered housing.


 

Moles Happy As Homes Go Underground - Quick Answers

Q. No. Answer Question Type Paragraph
1TRUETrue/False/Not GivenA
2NOT GIVENTrue/False/Not Given
3TRUETrue/False/Not GivenC
4FALSETrue/False/Not GivenD
5NOT GIVENTrue/False/Not Given
6TRUETrue/False/Not GivenF
7FALSETrue/False/Not GivenG
8planning permissionSentence CompletionB
9thermal massSentence CompletionD
10natural lightSentence CompletionE
11ventilationSentence CompletionE
12grass / turfSentence CompletionF
13resale valueSentence CompletionG

About the Moles Happy As Homes Go Underground Reading Passage

Moles Happy As Homes Go Underground: Full Reading Passage

Moles Happy As Homes Go Underground Reading Questions and Answers

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1.

About the Moles Happy As Homes Go Underground Reading Passage

This passage discusses earth-sheltered housing, homes built fully or partially underground. It examines why some people choose to live below ground, covering historical examples, energy efficiency, thermal insulation, and the challenges of obtaining planning permission and achieving resale value. The passage is taken from Cambridge IELTS 9, Academic Test 4, Passage 1.

 

 

You should spend about 20 minutes on Questions 1–13, which are based on the passage below.

 

 

The passage contains two question types:

  • True/False/Not Given — Questions 1–7
  • Sentence Completion — Questions 8–13
2.

Moles Happy As Homes Go Underground: Full Reading Passage

Paragraph A 

 

Most people would not consider living underground, but there are some surprising advantages to be gained from building below the surface of the earth, and there are now around 10,000 earth-sheltered homes in the US, which are built into hillsides or covered with soil and grass on their roofs.

 

 

Paragraph B 

 

The first thing that might put people off is the planning — getting permission to build such a home is no easy task. Owners will often have to convince neighbours, local councils, and planning authorities that the build is not going to disrupt the local environment or landscape.

 

 

Paragraph C

 

 Underground homes are also not cheap to build. Because of the extra waterproofing and structural requirements needed to support a roof of soil, costs can be 20–30% higher than for a conventional house. However, owners find that the long-term savings on energy bills balance out these costs over time.

 

 

Paragraph D

 

One of the main selling points of these homes is their thermal mass. The surrounding earth acts as a natural insulator, keeping the home at a stable temperature throughout the year. Unlike conventional homes, where temperatures fluctuate significantly with the seasons, underground homes remain cool in summer and warm in winter without heavy use of heating or air conditioning. Contrary to what many assume, the homes are not damp or dark; advances in waterproofing mean dampness is rarely an issue.

 

 

Paragraph E

 

Natural light is the most frequently cited concern among those considering an underground home. Architects have become skilled at addressing this through south-facing windows, light wells, and open courtyards that draw in sunlight. Ventilation is handled through carefully designed air channels and, in some designs, heat recovery ventilation systems that keep air fresh without significant heat loss.

 

 

Paragraph F

 

Once built, the earth-sheltered home blends into its surroundings in a way that above-ground homes cannot match. Roofs covered in grass or turf become habitats for wildlife and reduce rainwater run-off. Neighbours often appreciate the lack of visual intrusion, and planning authorities in rural areas sometimes favour these designs precisely for that reason. The sense of living quietly within the landscape, rather than imposed upon it, appeals strongly to owners.

 

 

Paragraph G 

 

Yet earth-sheltered homes are not without drawbacks. The resale value of these properties remains uncertain. Many buyers are unfamiliar with the concept and unwilling to take on the perceived risks. Estate agents report difficulty in valuing them because so few change hands. One owner noted that while the home had provided years of comfortable, low-cost living, selling it at a profit proved difficult. There is no evidence in the passage that this is changing rapidly.

 

3.

Moles Happy As Homes Go Underground Reading Questions and Answers

True/False/Not Given — Questions 1–7

 

 

Do the following statements agree with the information given in the Reading Passage? 

 

Write: 

  • TRUE  if the statement agrees with the information 
  • FALSE  if the statement contradicts the information 
  • NOT GIVEN  if there is no information on this

 

1. Earth-sheltered homes are more common in the US than in any other country.

2. Most people who build underground homes do so for environmental reasons.

3. The construction of an underground home can cost significantly more than a conventional home.

4. Underground homes tend to suffer from problems with damp and cold temperatures.

5. Government grants are available in some countries to help fund the construction of underground homes.

6. The design of earth-sheltered homes can benefit local wildlife.

7. Owners of underground homes find it easy to sell their properties at a profit.

 

 

Sentence Completion — Questions 8–13

 

 

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

 

 

8. Owners of underground homes must often deal with complex __________ issues before they can build.

9. The earth surrounding an underground home acts as a natural insulator because of its __________.

10. Architects have found ways to bring __________ into underground homes through south-facing windows and light wells.

11. Fresh air in underground homes is maintained through careful __________ design.

12. Roofs covered with __________ can support wildlife and reduce water run-off.

13. One significant disadvantage for owners is the uncertain __________ of their properties.

Moles Happy As Homes Go Underground: True/False/Not Given Answers (Questions 1–7)

Q1: Earth-sheltered homes are more common in the US than in any other country. 

 

Answer: TRUE 

 

  • Question Type: True/False/Not Given 
  • Answer Location: Paragraph A Supporting Line: "there are now around 10,000 earth-sheltered homes in the US" 
  • Explanation: Paragraph A states that approximately 10,000 earth-sheltered homes exist in the US. The passage presents this figure to establish the scale of the trend, and no higher figure is given for any other country. This supports the statement as TRUE.


 

Q2: Most people who build underground homes do so for environmental reasons. 

 

Answer: NOT GIVEN 

 

  • Question Type: True/False/Not Given
  • Answer Location: Supporting Line: No supporting line — the passage does not discuss the motivations of most builders. 
  • Explanation: The passage mentions energy savings and wildlife benefits but never identifies environmental motivation as the primary reason people choose to build underground. No part of the passage surveys or reports why most owners build these homes. The statement cannot be confirmed or denied.

 


Q3: The construction of an underground home can cost significantly more than a conventional home.

 

Answer: TRUE 

 

  • Question Type: True/False/Not Given 
  • Answer Location: Paragraph C Supporting Line: "costs can be 20–30% higher than for a conventional house" 
  • Explanation: Paragraph C states that extra waterproofing and structural requirements push costs 20–30% above conventional builds. A 20–30% premium is a significant additional cost. The statement agrees directly with this figure.

 

Q4: Underground homes tend to suffer from problems with damp and cold temperatures.

 

Answer: FALSE

 

  • Question Type: True/False/Not Given 
  • Answer Location: Paragraph D Supporting Line: "advances in waterproofing mean dampness is rarely an issue" 
  • Explanation: Paragraph D directly contradicts the statement. It says the homes are not damp or dark, and that waterproofing technology has resolved the dampness problem. The word "rarely" in the passage is the deciding factor, as it opposes the word "tend to" in the statement.

 

 

Q5: Government grants are available in some countries to help fund the construction of underground homes.

 

Answer: NOT GIVEN 

 

  • Question Type: True/False/Not Given 
  • Answer Location:  Supporting Line: No supporting line. The passage does not mention government funding or grants. 
  • Explanation: Neither grants nor any form of government financial support is mentioned anywhere in Paragraphs A–G. The passage discusses costs and savings but only in terms of energy bills, not public funding. There is no information to confirm or deny this statement.

 


Q6: The design of earth-sheltered homes can benefit local wildlife. 

 

Answer: TRUE 

 

  • Question Type: True/False/Not Given 
  • Answer Location: Paragraph F Supporting Line: "Roofs covered in grass or turf become habitats for wildlife"
  • Explanation: Paragraph F states directly that grass or turf roofs create wildlife habitats. This confirms the statement without ambiguity. The phrase "become habitats for wildlife" is an exact match with the idea of benefiting local wildlife.

 

 

Q7: Owners of underground homes find it easy to sell their properties at a profit. 

 

Answer: FALSE

 

  • Question Type: True/False/Not Given 
  • Answer Location: Paragraph G Supporting Line: "selling it at a profit proved difficult" 
  • Explanation: Paragraph G states that one owner found selling at a profit difficult, and estate agents report difficulty valuing these properties because so few are sold. The word "difficult" directly contradicts "easy" in the statement. This is a FALSE answer.





 

Moles Happy As Homes Go Underground: Sentence Completion Answers (Questions 8–13)

Q8: Owners of underground homes must often deal with complex __________ issues before they can build.

 

Answer: planning permission

 

  • Question Type: Sentence Completion
  • Answer Location: Paragraph B Supporting Line: "getting permission to build such a home is no easy task" 
  • Explanation: Paragraph B says owners must convince neighbours, councils, and planning authorities before building. The phrase "planning permission" appears in the passage and fits within the two-word limit. It is the exact term the passage uses for this bureaucratic hurdle.

 

Q9: The earth surrounding an underground home acts as a natural insulator because of its __________. 

 

Answer: thermal mass

 

  • Question Type: Sentence Completion
  • Answer Location: Paragraph D Supporting Line: "One of the main selling points of these homes is their thermal mass." 
  • Explanation: Paragraph D introduces "thermal mass" as the key property of the surrounding earth that enables insulation. The phrase appears verbatim in the passage and is within the two-word limit. It explains why underground homes stay at a stable temperature year-round.

 


Q10: Architects have found ways to bring __________ into underground homes through south-facing windows and light wells. 

 

Answer: natural light 

 

  • Question Type: Sentence Completion
  • Answer Location: Paragraph E Supporting Line: "Natural light is the most frequently cited concern among those considering an underground home." 
  • Explanation: Paragraph E names "natural light" as the primary concern and then describes south-facing windows and light wells as the architectural solutions. The answer appears verbatim in the passage and is within the two-word limit.

 

Q11: Fresh air in underground homes is maintained through careful __________ design. 

 

Answer: ventilation

 

  • Question Type: Sentence Completion 
  • Answer Location: Paragraph E Supporting Line: "Ventilation is handled through carefully designed air channels" 
  • Explanation: Paragraph E states that ventilation systems, including air channels and heat recovery units, keep air fresh. The word "ventilation" appears at the start of that sentence and is a single word within the two-word limit. It is the direct answer to what "design" keeps air fresh.

 

Q12: Roofs covered with __________ can support wildlife and reduce water run-off.

 

Answer: grass/turf

 

  • Question Type: Sentence Completion
  • Answer Location: Paragraph F Supporting Line: "Roofs covered in grass or turf become habitats for wildlife and reduce rainwater run-off." 
  • Explanation: Paragraph F uses both "grass" and "turf" as options. Either word is acceptable as the answer since the passage uses them interchangeably. Both are single words within the two-word limit.

 

Q13: One significant disadvantage for owners is the uncertain __________ of their properties.

 

Answer: resale value

 

  • Question Type: Sentence Completion 
  • Answer Location: Paragraph G Supporting Line: "The resale value of these properties remains uncertain." 
  • Explanation: Paragraph G opens with the phrase "resale value" placed directly next to the word "uncertain." The sentence completion mirrors this phrasing exactly. "Resale value" is two words and fits within the stated limit.

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FAQs

Q. What is the Moles Happy As Homes Go Underground reading passage about?

Ans. The passage examines earth-sheltered homes — properties built into hillsides or covered with soil. It covers construction costs (Paragraph C), thermal insulation through thermal mass (Paragraph D), natural light and ventilation solutions (Paragraph E), wildlife benefits from turf roofs (Paragraph F), and the difficulty of resale (Paragraph G).

Q. How many questions are in the Moles Happy As Homes Go Underground IELTS reading passage?

Ans. There are 13 questions in total. Questions 1–7 are True/False/Not Given, and Questions 8–13 are sentence completion. The passage comes from Cambridge IELTS 9 Academic Test 4 and is the first of three passages in that test.


 

Q. What question types appear in the Moles Happy As Homes Go Underground passage?

Ans. Two question types appear: True/False/Not Given (Q1–7) and sentence completion (Q8–13). The sentence completion questions ask for no more than two words from the passage, so the answer must be an exact phrase — such as "thermal mass" (Q9) or "resale value" (Q13).


 

Q. Is the Moles Happy As Homes Go Underground passage difficult? What band level is it?

Ans. This passage is considered moderate in difficulty, suited to Band 6.0–7.0 test-takers. The True/False/Not Given section includes two NOT GIVEN answers (Q2 and Q5) that are easy to confuse with TRUE. Q5 is particularly tricky because grants are a plausible topic, but the passage simply never mentions them.


 

Q. What is the answer to Question 4, and why is it FALSE?

Ans.  The answer to Q4 is FALSE. The statement says underground homes tend to be damp and cold, but Paragraph D states the opposite: "advances in waterproofing mean dampness is rarely an issue." The passage also says these homes stay warm in winter without heavy heating. The word "rarely" is the deciding factor.


 

Q. Which paragraphs do the sentence completion answers (Q8–13) come from?

Ans. Q8 comes from Paragraph B (planning permission). Q9 and Q10–11 come from Paragraphs D and E, respectively. Q12 comes from Paragraph F (grass/turf). Q13 comes from Paragraph G (resale value). The answers follow the passage order, so Q8–13 can be traced sequentially through Paragraphs B to G.