Reading: Multiple Choice & Summary Completion

Real-world analogy

What is it?

Multiple Choice questions give you a question or incomplete statement with several options and ask you to select the correct one(s). Summary Completion gives you a shortened version of part of the passage with gaps to fill. Both types test detailed comprehension and the ability to distinguish between correct answers and cleverly designed distractors.

Real-world relevance

Multiple choice is everywhere — from medical diagnoses (ruling out conditions) to choosing the best product review to trust. Summary Completion mirrors what professionals do daily: reading a long report and writing an executive summary that captures key details accurately. Both are real-world comprehension skills dressed up as test questions.

Key points

• Multiple Choice Formats — IELTS uses two MC formats: choose ONE correct answer from A-D, or choose TWO/THREE correct answers from a longer list (A-G). The single-answer type tests detailed understanding, while the multiple-answer type tests your ability to identify several related points scattered across the passage.
• Eliminating Wrong Options — For each MC question, actively eliminate wrong options before choosing. Wrong options typically fall into three categories: (1) contradicts the passage, (2) is true but does not answer the specific question, (3) is not mentioned in the passage. Crossing out wrong answers is more reliable than trying to spot the right one directly.
• Beware of "Looks Right" Traps — IELTS MC options often include one that SOUNDS correct based on common knowledge but is not supported by the passage. Always check your answer against the text, never against what you already know. Option C might be a well-known fact, but if the passage does not state it, it is wrong in IELTS context.
• Summary Completion Types — Summary Completion comes in two forms: (1) choose words from a box (list of options), or (2) choose words directly from the passage within a word limit (e.g., "NO MORE THAN TWO WORDS"). The box version is generally easier because you have a limited set of options. The passage version requires more careful scanning.
• Grammar as a Clue — In Summary Completion, the grammar of the sentence tells you what type of word is needed. A blank after "the" needs a noun. A blank before a noun needs an adjective. A blank after a subject needs a verb. Use grammar to eliminate impossible options before checking the passage.
• Word Limit Rules — When the instructions say "NO MORE THAN TWO WORDS," you can write one or two words but never three. "Climate change" (two words) is acceptable but "global climate change" (three words) is not, even if the passage uses three words. Hyphenated words like "well-known" count as one word. Numbers written as figures (42%) count as one word.
• Locating the Summary Section — A summary usually paraphrases a specific section of the passage, not the entire passage. Read the first sentence of the summary to identify which part of the passage it relates to. Then read that section of the passage carefully. The summary follows the same order as the passage.
• MC and Passage Order — Multiple Choice questions generally follow the order of the passage. Question 1 relates to earlier paragraphs, question 2 to later paragraphs, and so on. Use this to narrow your search. However, "global" questions like "What is the main purpose of the passage?" refer to the entire text and usually come last.
• Time Strategy for MC — MC questions take longer than most other types because you must evaluate each option. Budget about 1.5-2 minutes per MC question. If stuck between two options, re-read the specific passage section — the answer is always there. Do not spend more than 2 minutes; mark your best guess and return later.

Code example

PASSAGE:

Vertical Farming: Agriculture's Next Revolution

Vertical farming — growing crops in stacked layers
inside controlled indoor environments — has attracted
over 6 billion dollars in global investment since 2015.
Proponents argue it uses 95% less water than traditional
farming and eliminates the need for pesticides, since the
sealed environments keep pests out naturally.

However, the economics remain challenging. Energy costs
for LED lighting and climate control account for roughly
60% of operating expenses. A head of lettuce from a
vertical farm costs approximately 3-4 dollars to produce,
compared to 1 dollar from conventional farming. Only
high-value, fast-growing crops like leafy greens, herbs,
and strawberries are currently profitable.

Despite cost hurdles, several factors drive continued
growth. Supply chain disruptions during the COVID-19
pandemic highlighted the fragility of long-distance food
transport. Climate change threatens traditional farmland
through droughts and floods. And urbanisation means 68%
of the world population will live in cities by 2050,
far from conventional farms.

AeroFarms, based in Newark, New Jersey, operates the
world's largest indoor vertical farm at 150,000 square
feet. The company grows over 550 varieties of plants
and has achieved yields 390 times greater per square
foot than traditional field farming.

MULTIPLE CHOICE:
Q: What is the main reason vertical farming remains
   economically difficult?
A. The technology has not been invented yet
B. Energy costs for lighting and climate control
   are very high
C. Consumers refuse to buy vertically farmed products
D. Governments have banned vertical farming subsidies

Analysis:
- A is FALSE: the technology exists (the passage
  describes working farms)
- B is CORRECT: "Energy costs... account for roughly
  60% of operating expenses"
- C is NOT MENTIONED: the passage says nothing about
  consumer attitudes
- D is NOT MENTIONED: subsidies are never discussed
Answer: B

SUMMARY COMPLETION (No more than TWO WORDS):
"Vertical farming uses 95% less (1)_____ than
conventional methods and does not require (2)_____ due
to its sealed growing environment. However, (3)_____
costs make up about 60% of expenses. Currently, only
(4)_____ crops such as lettuce and herbs can be grown
profitably."

Answers:
(1) water
(2) pesticides
(3) energy [or "Energy"]
(4) high-value

Line-by-line walkthrough

1. 1. The passage has 4 paragraphs: benefits of vertical farming, economic challenges, growth drivers, and a specific company example (AeroFarms).
2. 2. The MC question asks about economic difficulty — so we focus on paragraph 2, which discusses costs.
3. 3. Option A is eliminated because the passage describes existing farms, proving the technology works.
4. 4. Option B matches the passage directly: "Energy costs... account for roughly 60% of operating expenses."
5. 5. Options C and D introduce topics (consumer attitudes, government subsidies) never mentioned in the passage — classic "not mentioned" distractors.
6. 6. For Summary Completion, gap (1) needs a noun after "less" — the passage says "95% less water."
7. 7. Gap (2) needs a plural noun after "require" — "pesticides" fits both the grammar and the passage content.
8. 8. Gap (4) requires an adjective before "crops" — "high-value" from the passage is the answer, and as a hyphenated word it counts as one word, within the two-word limit.

Spot the bug

A student's answers to the Summary Completion:

"Vertical farming uses 95% less (1) WATER AND LAND than
conventional methods and does not require (2) CHEMICAL
PESTICIDES due to its sealed environment. However,
(3) OPERATING costs make up about 60% of expenses.
Currently, only (4) FAST GROWING crops can be grown
profitably."

Explain like I'm 5

Fun fact

Hands-on challenge

More resources

• IELTS Reading: Multiple Choice Tips (IELTS Liz)
• IELTS Reading Free Practice Tests (British Council)
• Summary Completion Strategy (IELTS.org)
• Cambridge IELTS 17 Academic - Practice Tests (Cambridge)