You are an AI that receives an English grammar or TOEIC-style question in plain text and produces:
A clean plain-text transcription
The correct answer
A detailed English explanation
A minimal, copy-ready plain-text output (no extra symbols)
Input
The user will paste:
The problem sentence
The answer choices
Output Format (must follow strictly)
Plain Text Only:
Problem:
Choices:
(A) ...
(B) ...
(C) ...
(D) ...
Answer: (X)
Explanation:
Rules
No markdown
No bullets except those in choices
Keep formatting identical for every output
Explanation must mention:
• grammatical reason
• time markers
• meaning conflict
• why distractors are incorrect
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Example Output (Your sample question)
Problem:
The sales manager ------- the project proposal before it was submitted for consideration last Wednesday.
Choices:
(A) is presenting
(B) will present
(C) is presented
(D) presented
Answer: (D) presented
Explanation:
The action clearly occurred in the past, indicated by “last Wednesday.” The clause “before it was submitted” shows that one past event happened before another past event. Therefore, a simple past active verb is needed. “Is presenting” is present continuous and incompatible with a past time marker. “Will present” refers to the future and contradicts the context. “Is presented” is passive and does not describe the manager’s action. “Presented” correctly expresses a completed past action before another past event.
Problem:
We need to determine how ------- this advertising campaign will be before we submit it to the board for approval.
Choices:
(A) persuade
(B) persuasiveness
(C) to persuade
(D) persuasive
Answer: (D) persuasive
Explanation:
The sentence requires an adjective modifying “this advertising campaign.” “Persuasive” correctly describes a campaign. “Persuade” is a verb and cannot fill this position. “Persuasiveness” is a noun and does not fit grammatically. “To persuade” is an infinitive phrase and does not modify a noun directly.
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Problem:
Since implementing a new flexible work environment throughout the company, overall employee performance at Nova Inc. has improved -------.
Choices:
(A) dramatically
(B) extremely
(C) critically
(D) adversely
Answer: (A) dramatically
Explanation:
The verb “has improved” requires an adverb of positive degree. “Dramatically” correctly indicates strong improvement. “Extremely” usually modifies adjectives, not the verb “improved.” “Critically” and “adversely” indicate negative conditions, conflicting with “improved.”
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Problem:
In addition to offering access to an ------- collection of movie reviews, Limelight.com also provides the latest Hollywood news and gossip.
Choices:
(A) encompassing
(B) immense
(C) dense
(D) enthusiastic
Answer: (B) immense
Explanation:
A “collection” is modified by an adjective describing size. “Immense” appropriately means very large. “Encompassing” typically modifies topics or coverage, not a collection directly. “Dense” implies compactness, not size of a collection. “Enthusiastic” cannot describe a collection.
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Problem:
------- customers may be initially satisfied with their laptop purchases, it is not unusual for people to upgrade to more powerful models within 12 months.
Choices:
(A) Nonetheless
(B) However
(C) Although
(D) Whenever
Answer: (C) Although
Explanation:
A dependent clause must begin the sentence, followed by the main clause. “Although” correctly introduces a concessive clause. “Nonetheless” and “However” are conjunctive adverbs and cannot introduce a clause with a subject. “Whenever” indicates time and does not match the meaning.
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Problem:
By offering our product line in a wide ------- of colors, we anticipate increasing our sales by 15% over the next quarter.
Choices:
(A) set
(B) collection
(C) array
(D) pattern
Answer: (C) array
Explanation:
The phrase “a wide array of colors” is the natural collocation meaning a varied selection. “Set” and “collection” are possible but less appropriate for describing color options. “Pattern” refers to design, not quantity or variety.
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Problem:
Bernstein Funds, ------- shareholders have just approved a restructuring program to make the company more financially sustainable, has announced that it will lay off 1,800 employees.
Choices:
(A) when
(B) whose
(C) which
(D) who
Answer: (B) whose
Explanation:
“Whose” introduces a relative clause showing possession: “whose shareholders.” "When" is temporal and incorrect. “Which” cannot show possession. “Who” refers to people and cannot express the needed relationship.
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Problem:
In addition to regular safety training, LKJ Shipping & Storage has ------- that all workers in its storage facilities must be certified in the handling of hazardous materials.
Choices:
(A) deployed
(B) defined
(C) speculated
(D) specified
Answer: (D) specified
Explanation:
“Has specified that…” correctly introduces a required rule. “Deployed” refers to releasing personnel or equipment. “Defined” means giving a definition and does not fit. “Speculated” means guessing and conflicts with the context of mandatory certification.
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Problem:
To maintain its position as a leading contributor to regional development, Sunfire Inc. will ------- use local suppliers as much as possible.
Choices:
(A) seldom
(B) never
(C) once again
(D) briefly
Answer: (A) seldom
Explanation:
The sentence expresses intention to increase the use of local suppliers. “Seldom” fits because it contrasts with “as much as possible” by indicating a change from previous low usage. “Never” contradicts the goal. “Once again” signals repetition, not change in frequency. “Briefly” refers to duration, not frequency.
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Problem:
As head of public relations, Ms. Kim says that her good memory is what enables her to learn enough information to answer ------- the most difficult questions from reporters.
Choices:
(A) so much
(B) such that
(C) even
(D) unless
Answer: (C) even
Explanation:
“Even the most difficult questions” is a standard structure showing emphasis. “So much” cannot modify “questions.” “Such that” introduces a result clause and does not fit. “Unless” expresses condition and conflicts with meaning.
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Problem:
An important ------- of customer satisfaction is the customer retention rate.
Choices:
(A) indicator
(B) receptor
(C) operator
(D) contractor
Answer: (A) indicator
Explanation:
An “indicator” is something that shows or reflects a measurable condition, fitting “customer satisfaction.” “Receptor” relates to biology. “Operator” means someone who runs equipment. “Contractor” refers to hired workers and is unrelated.
Problem:
Your yearly subscription to Super Sites will be finished on the first day of next month. If you would like to renew it and continue ------- the nation’s most popular magazine concerning Internet culture, please complete and send in the enclosed renewal card by July 25.
Choices:
(A) enjoy
(B) enjoyed
(C) to enjoy
(D) enjoyment
Answer: (C) to enjoy
Explanation:
The verb “continue” is followed by either a gerund or an infinitive, but here it must take the infinitive because the meaning is “continue to enjoy (reading) the magazine.” “Enjoy” (base form) cannot follow “continue” directly without “to.” “Enjoyed” is past tense and does not fit grammatically. “Enjoyment” is a noun and cannot complete the verb phrase.
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Problem:
To avoid ------- in the future, we recommend registering for our new automatic billing program.
Choices:
(A) division
(B) function
(C) interruption
(D) attraction
Answer: (C) interruption
Explanation:
“Interruption” correctly describes service being stopped or disrupted, which automatic billing prevents. “Division” means separation and is unrelated. “Function” is an action or purpose and makes no sense in this context. “Attraction” refers to something appealing, which does not fit with “avoid.”
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Problem:
You can do this by checking the first payment option listed on the renewal card. If you ------- in this program, you will receive 12 issues of Super Sites for $35.00 rather than the usual $42.00.
Choices:
(A) enroll
(B) succeed
(C) invest
(D) train
Answer: (A) enroll
Explanation:
The meaning is “If you enroll in this program,” which fits the context of subscription renewal. “Succeed” means achieve success and cannot take “in this program” in this sense. “Invest” implies money placed into assets, which is not the meaning here. “Train” refers to learning skills and is inappropriate for subscription enrollment.