Correct answer: B. off
Explanation:
The phrasal verb “run off” means to quickly produce copies of something, typically on a photocopier or printer.
The structure is: run off + [number] + copies
Why the other options are incorrect:
• A. at: This preposition does not form a phrasal verb with “run” that relates to making copies. “Run at” can mean to charge towards someone.
• C. on: “Run on” means to continue operating or speaking for a long time (e.g., “The engine ran on diesel,” “She ran on about her vacation”). It does not mean to make copies.
• D. out of: This phrasal verb means to have no more of something left (e.g., “We have run out of paper”). It is the opposite of the intended meaning, which is to produce copies.
Examples:
Can you run off 20 flyers for the meeting?
I need to run off a copy of my resume.
Therefore, “Could you run off 10 copies of this hand-out, please?” is the correct way to ask someone to make the copies.

Correct answer: D. on
Explanation:
The correct preposition here is “on”. We use “on” when referring to surfaces, locations, or areas where someone spends time or engages in activities.
• “On” is used to indicate a surface or location, such as “on the banks of the river,” meaning near or along the river’s edge. It’s commonly used to describe places or areas where activities take place.
• “In” refers to being inside a space or area, but not for the banks of a river.
• “To” indicates direction or movement, not location.
• “About” refers to a subject or topic, not a location.
Thus, “He spends his time on the banks of the river” is correct because “on” is used to describe spending time at a location like the banks of a river.

D. off
Correct answer: A. Without
Explanation:
The preposition “without” means “not having” or “in the absence of.” The phrase “go without” is an idiom meaning to endure the lack of something.
The sentence “They went without sleep for several days” means they endured a period of several days with no sleep.
Why the other options are incorrect:
• B. out of: The phrasal verb “go out of” means to leave a place or to become no longer fashionable. It does not make sense in this context.
• C. for: “Go for sleep” would mean they went somewhere with the purpose of sleeping, which contradicts the meaning of the sentence.
• D. off: The phrasal verb “go off” can mean to explode, to stop functioning, or (for food) to spoil. It is completely unrelated to the meaning of lacking something.
Examples:
• During the power cut, we had to go without electricity.
• She went without food for two days.

Correct answer: C. Than
Explanation:
This sentence is making a comparison between the level of quietness in a country and a city. When comparing two things, we use the word “than”.
The structure for a comparative adjective is: [Adjective] + -er + than
In this case:
• The comparative adjective is “quieter.”
• The word connecting the two things being compared is “than.”
Why the other options are incorrect:
• A. With: This means “accompanied by.” It does not create a comparison.
• B. To: This preposition is used for other structures, like “prefer A to B,” but not with the comparative form “-er.”
• D. Ago: This is used to indicate a time in the past (e.g., “five years ago”) and is completely unrelated to comparisons.
Examples:
• She is taller than her brother.
• This car is more expensive than that one.
Therefore, “A country is quieter than a city” is the grammatically correct way to make this comparison.

Correct answer is D. none of these.
The verb “lead” (meaning to live or experience a particular kind of life) is a transitive verb. This means it takes a direct object without needing a preposition.
In the sentence “My friend leads a very easy life,” the noun phrase “a very easy life” is the direct object. No preposition is required or correct between the verb “leads” and its object.
Let’s see why the other options are incorrect:
• A. with: Adding “with” is unnecessary and grammatically incorrect. You lead a life, not “lead with a life.”
• B. in: Adding “in” is also incorrect. While you can live in a certain way, the verb “lead” directly takes the type of life as its object.
• C. to: The phrasal verb “lead to” means “to result in” or “to cause” (e.g., “Hard work leads to success”). This is not the meaning intended in this sentence.
Examples:
• He leads a simple life.
• She led a life of adventure.
Therefore, the correct sentence is: “My friend leads a very easy life.” No preposition is needed, making “none of these” the right choice.

Correct answer: A. at
Explanation:
The correct preposition here is “at”. We use “good at” when referring to a particular skill or ability.
• “At” is used with adjectives like “good,” “bad,” “skilled,” or “talented” to describe proficiency or ability in a specific activity or subject. For example, “I am not good at repairing things” means that the speaker does not have skill in repairing things.
• “For” is used to indicate purpose or suitability, but not for describing ability.
• “Of” is used for possession or characteristics, not abilities.
• “On” is used for surfaces, positions, or topics, but not for skills or abilities.
Thus, “I am not good at repairing things” is correct because “at” is used to express proficiency in a skill.

Correct answer: C. to
Explanation:
The correct preposition here is “to”. We use “get to” when referring to arriving at a place, especially a specific destination like a hotel.
• “To” is used with verbs like “get” to indicate movement toward a destination. For example, “When did you get to the hotel?” means asking about the time of arrival at the hotel.
• “On” is used to refer to surfaces or modes of transportation (e.g., “get on the bus”).
• “Off” is used when exiting a vehicle or surface (e.g., “get off the bus”).
• “At” is used to refer to a specific point or location but is not used with “get” when referring to arrival.
Examples:
What time did you get to the airport?
We got to the party late.

Thus, “When did you get to the hotel?” is correct because “to” indicates the destination.

Correct answer: D. in
Explanation:
The phrasal verb “check in” means to announce your arrival at a hotel, an airport, or a conference. At an airport, it specifically refers to the process of getting your boarding pass and handing over your luggage.
The structure is: check in + for + [flight/event]
Why the other options are incorrect:
• A. for: The phrase “check for” means to look for or verify the existence of something (e.g., “Check for errors”). It is not the term used for the airport arrival procedure.
• B. out: The phrasal verb “check out” means to leave a hotel or to examine something. It is the opposite process of “checking in.”
• C. with: “Check with” means to consult or ask someone for confirmation (e.g., “I need to check with my boss”). It does not describe the airport procedure.
Examples:
• Please check in at the front desk.
• We need to check in for our flight two hours before departure.
Therefore, “Where can I check in for the flight to Hong Kong?” is the correct question to ask at the airport.

Correct answer: D. to
Explanation: The adjective “averse” is followed by the preposition “to.” This is a fixed prepositional pairing.
The structure is: averse + to + [noun/gerund]
It means to have a strong dislike or opposition to something.
Why the other options are incorrect:
• A. against: While “against” is a synonym for “opposed to,” it is not used with the specific adjective “averse.”
• B. for: This preposition indicates purpose or benefit (e.g., “eager for”) and is not used with “averse.”
• C. about: We do not say “averse about.” This is not a standard combination.
Examples:
• He is not averse to taking risks.
• I am averse to the idea of selling the house.
• She is averse to any kind of conflict.
Therefore, “If you are averse to recommending my name, you should not hesitate to admit it” is the grammatically correct sentence.

Correct answer: D. with
Explanation:
The verb “filled” is followed by the preposition “with” to indicate the material or substance that occupies the space.
The structure is: be + filled + with + [thing filling the space]
Why the other options are incorrect:
• A. on: This indicates position on a surface (e.g., “the book is on the table”). It is not used to describe contents.
• B. by: This preposition is used in passive voice to introduce the agent (the doer of the action). For example, “The room was filled by the staff.” Here, “smoke” is not the agent performing the action of filling; it is the material filling the room.
• C. to: This indicates direction or extent (e.g., “filled to the brim”). It does not introduce the substance that fills something.
Examples:
The shelves were filled with books.
Her eyes filled with tears.
The air was filled with the smell of flowers.