ACT Exam 2026–2027 Latest Comprehensive
Study Guide with Practice Questions,
Detailed Answer Explanations, Test Prep
Review & Success Strategies
1. Which of the following alternatives to the underlined portion would NOT be
acceptable?
• A. cultures
• B. societies
• C. civilizations
• D. communities
Correct Answer: A. cultures
Rationale: The sentence discusses "human culture" in a general sense. While
"cultures" (plural) could technically work, it shifts the meaning from a singular
collective human culture to multiple distinct cultures. The singular "culture" is
most appropriate in this context. The other options (B, C, D) are all acceptable
synonyms that maintain the intended meaning.
2. If the writer were to delete the phrase "often accompanied by music or dance"
from the preceding sentence, the sentence would primarily lose:
• A. a detail that explains how oral storytelling was performed
• B. a statement that contradicts the main idea of the passage
• C. an example of modern storytelling methods
• D. a conclusion about the importance of storytelling
Correct Answer: A. a detail that explains how oral storytelling was performed
,Rationale: The phrase provides specific information about the performance
aspects of oral storytelling, describing how stories were delivered. This adds
richness to the description of early storytelling practices.
3.
• A. NO CHANGE
• B. have been recorded
• C. was recorded
• D. recording
Correct Answer: B. have been recorded
Rationale: The sentence discusses a process that began in the past and continues to
the present. The present perfect tense "have been recorded" correctly indicates an
action that started in the past and has ongoing relevance. "Were recorded" (A) is
past tense and doesn't convey the ongoing nature. "Was recorded" (C) is singular
and doesn't match the plural subject "stories." "Recording" (D) creates a sentence
fragment.
4. Given that all the choices are true, which one most effectively introduces the
main topic of the paragraph?
• A. NO CHANGE
• B. Storytelling has evolved significantly over time.
• C. Many people enjoy listening to stories.
• D. Stories can be found in every culture.
Correct Answer: B. Storytelling has evolved significantly over time.
Rationale: The paragraph discusses the evolution of storytelling from oral
traditions to written forms to modern media. Option B best introduces this theme.
Option A is too general, C focuses on audience enjoyment rather than evolution,
and D is a truism that doesn't set up the paragraph's content.
,Passage 2: The Science of Sleep
Sleep is essential for human health and well-being. (5) During sleep, the body
repairs itself, and the brain consolidates memories. (6) Adults typically need
between seven and nine hours of sleep per night, yet many people get far less. (7)
Chronic sleep deprivation has been linked to a variety of health problems,
including obesity, diabetes, and cardiovascular disease. (8) Despite the clear
benefits of sleep, modern life often interferes with our ability to get enough rest.
5. Which of the following would be the most logical placement for the sentence:
"This process is crucial for learning and memory formation."?
• A. Before sentence 5
• B. After sentence 5
• C. After sentence 6
• D. After sentence 8
Correct Answer: B. After sentence 5
Rationale: Sentence 5 mentions that "the brain consolidates memories." The
proposed sentence directly refers to this process ("This process") and explains its
importance. Placing it immediately after sentence 5 creates a logical connection.
6.
• A. NO CHANGE
• B. have been linked
• C. links
• D. linking
Correct Answer: B. have been linked
Rationale: The subject "Chronic sleep deprivation" is singular, so the verb must
agree. "Has been linked" (A) is correct. However, the question asks for the best
choice among the options. "Have been linked" (B) would be incorrect because it's
plural. "Links" (C) is present tense and doesn't fit the context of established
, research findings. "Linking" (D) creates a sentence fragment. The correct answer is
actually A (NO CHANGE), but since the instruction says to highlight the correct
answer in bold and the question as written has A as the correct choice, I will note
that A is correct. However, to follow the format, I'll adjust: the correct answer is A.
Correction: For question 6, the correct answer is A. NO CHANGE.
7.
• A. NO CHANGE
• B. its
• C. there
• D. their
Correct Answer: B. its
Rationale: "Its" is the possessive form of "it" and correctly refers to the singular
noun "body." "Their" (D) is plural and would not agree with the singular
antecedent. "There" (C) indicates a place and is incorrect. "It's" (A) is a contraction
for "it is" and is incorrect in this context.
8. The writer is considering adding the following sentence: "In fact, studies show
that people who sleep less than six hours per night have a higher risk of mortality."
Should the writer add this sentence, and if so, where?
• A. Yes, after sentence 5
• B. Yes, after sentence 7
• C. No, because it contradicts information in the passage
• D. No, because it is not relevant to the topic
Correct Answer: B. Yes, after sentence 7
Rationale: Sentence 7 discusses health problems linked to sleep deprivation. The
proposed sentence provides additional evidence about the serious consequences of
insufficient sleep (higher mortality risk), making it a logical extension of sentence
7. It does not contradict the passage and is highly relevant.
Study Guide with Practice Questions,
Detailed Answer Explanations, Test Prep
Review & Success Strategies
1. Which of the following alternatives to the underlined portion would NOT be
acceptable?
• A. cultures
• B. societies
• C. civilizations
• D. communities
Correct Answer: A. cultures
Rationale: The sentence discusses "human culture" in a general sense. While
"cultures" (plural) could technically work, it shifts the meaning from a singular
collective human culture to multiple distinct cultures. The singular "culture" is
most appropriate in this context. The other options (B, C, D) are all acceptable
synonyms that maintain the intended meaning.
2. If the writer were to delete the phrase "often accompanied by music or dance"
from the preceding sentence, the sentence would primarily lose:
• A. a detail that explains how oral storytelling was performed
• B. a statement that contradicts the main idea of the passage
• C. an example of modern storytelling methods
• D. a conclusion about the importance of storytelling
Correct Answer: A. a detail that explains how oral storytelling was performed
,Rationale: The phrase provides specific information about the performance
aspects of oral storytelling, describing how stories were delivered. This adds
richness to the description of early storytelling practices.
3.
• A. NO CHANGE
• B. have been recorded
• C. was recorded
• D. recording
Correct Answer: B. have been recorded
Rationale: The sentence discusses a process that began in the past and continues to
the present. The present perfect tense "have been recorded" correctly indicates an
action that started in the past and has ongoing relevance. "Were recorded" (A) is
past tense and doesn't convey the ongoing nature. "Was recorded" (C) is singular
and doesn't match the plural subject "stories." "Recording" (D) creates a sentence
fragment.
4. Given that all the choices are true, which one most effectively introduces the
main topic of the paragraph?
• A. NO CHANGE
• B. Storytelling has evolved significantly over time.
• C. Many people enjoy listening to stories.
• D. Stories can be found in every culture.
Correct Answer: B. Storytelling has evolved significantly over time.
Rationale: The paragraph discusses the evolution of storytelling from oral
traditions to written forms to modern media. Option B best introduces this theme.
Option A is too general, C focuses on audience enjoyment rather than evolution,
and D is a truism that doesn't set up the paragraph's content.
,Passage 2: The Science of Sleep
Sleep is essential for human health and well-being. (5) During sleep, the body
repairs itself, and the brain consolidates memories. (6) Adults typically need
between seven and nine hours of sleep per night, yet many people get far less. (7)
Chronic sleep deprivation has been linked to a variety of health problems,
including obesity, diabetes, and cardiovascular disease. (8) Despite the clear
benefits of sleep, modern life often interferes with our ability to get enough rest.
5. Which of the following would be the most logical placement for the sentence:
"This process is crucial for learning and memory formation."?
• A. Before sentence 5
• B. After sentence 5
• C. After sentence 6
• D. After sentence 8
Correct Answer: B. After sentence 5
Rationale: Sentence 5 mentions that "the brain consolidates memories." The
proposed sentence directly refers to this process ("This process") and explains its
importance. Placing it immediately after sentence 5 creates a logical connection.
6.
• A. NO CHANGE
• B. have been linked
• C. links
• D. linking
Correct Answer: B. have been linked
Rationale: The subject "Chronic sleep deprivation" is singular, so the verb must
agree. "Has been linked" (A) is correct. However, the question asks for the best
choice among the options. "Have been linked" (B) would be incorrect because it's
plural. "Links" (C) is present tense and doesn't fit the context of established
, research findings. "Linking" (D) creates a sentence fragment. The correct answer is
actually A (NO CHANGE), but since the instruction says to highlight the correct
answer in bold and the question as written has A as the correct choice, I will note
that A is correct. However, to follow the format, I'll adjust: the correct answer is A.
Correction: For question 6, the correct answer is A. NO CHANGE.
7.
• A. NO CHANGE
• B. its
• C. there
• D. their
Correct Answer: B. its
Rationale: "Its" is the possessive form of "it" and correctly refers to the singular
noun "body." "Their" (D) is plural and would not agree with the singular
antecedent. "There" (C) indicates a place and is incorrect. "It's" (A) is a contraction
for "it is" and is incorrect in this context.
8. The writer is considering adding the following sentence: "In fact, studies show
that people who sleep less than six hours per night have a higher risk of mortality."
Should the writer add this sentence, and if so, where?
• A. Yes, after sentence 5
• B. Yes, after sentence 7
• C. No, because it contradicts information in the passage
• D. No, because it is not relevant to the topic
Correct Answer: B. Yes, after sentence 7
Rationale: Sentence 7 discusses health problems linked to sleep deprivation. The
proposed sentence provides additional evidence about the serious consequences of
insufficient sleep (higher mortality risk), making it a logical extension of sentence
7. It does not contradict the passage and is highly relevant.
