Quiz: B2–C1 Vocabulary Set 1 — 9 questions

1. Which sentence uses “substantial” to describe something large or important?

A. There has been a substantial increase in demand.

B. She made considerable progress during the project.

C. The policy had a significant impact on society.

D. The report found a significant difference between the groups.

Answer: (A)

Explanation

“Substantial” describes something large or important, as in a substantial increase in demand. “Significant” and “considerable” are related terms, but they are tested by different collocations here.

2. What does “significant” mean when describing a policy’s impact on society?

A. Important or noticeable

B. Basic and essential

C. Fairly large or important

D. Possible and practical

Answer: (A)

Explanation

“Significant” means important or noticeable and commonly describes an impact or difference. “Fairly large or important” is the meaning of “considerable,” not the target term.

3. Which word best completes the sentence: “Communication plays a ______ role in learning”?

A. Fundamental

B. Crucial

C. Pivotal

D. Essential

Answer: (B)

Explanation

“Crucial” means extremely important and forms the collocation “crucial role.” “Fundamental” refers more broadly to something basic and essential, while the other terms are related alternatives with different emphasis.

4. Which sentence correctly uses “fundamental” to express a basic and essential idea?

A. Communication plays a crucial role in learning.

B. Critical thinking is an essential skill for researchers.

C. Education played a pivotal role in her success.

D. Trust is fundamental to a healthy relationship.

Answer: (D)

Explanation

“Fundamental” describes something basic and essential, as in trust being fundamental to a healthy relationship. The other sentences illustrate “essential,” “pivotal,” and “crucial,” which emphasize different aspects of importance.

5. Which statement best describes an essential component of a system?

A. It is important or noticeable within the system.

B. It is extremely important to the system’s development.

C. It is completely necessary for the system to function.

D. It is fairly large or important to the system.

Answer: (C)

Explanation

“Essential” means completely necessary, so an essential component is required for the system to function. An extremely important developmental role is better described as pivotal, not essential.

6. A scientist predicts that a natural event is certain to happen, although its timing is unknown; which word best describes the event?

A. Inevitable

B. Feasible

C. Significant

D. Considerable

Answer: (A)

Explanation

“Inevitable” describes something certain to happen, even when the exact timing is uncertain. “Feasible” means possible and practical, so it does not express certainty.

7. A team is evaluating whether a proposed project can be carried out successfully within its resources; which quality are they assessing?

A. Whether the project is substantial

B. Whether the project is feasible

C. Whether the project is fundamental

D. Whether the project is inevitable

Answer: (B)

Explanation

“Feasible” means possible and practical, which matches assessing whether a project can be carried out with available resources. “Inevitable” concerns certainty of occurrence rather than practical achievability.

8. What does the adjective “compelling” mean when describing an argument or evidence?

A. Technically detailed and complex

B. Very convincing or persuasive

C. Carefully organized and concise

D. Widely discussed and familiar

Answer: (B)

Explanation

“Compelling” describes something that is very convincing or persuasive. A detailed or familiar argument may still fail to persuade, so those qualities do not define the term.

9. Which sentence uses “compelling” correctly to describe evidence?

A. The study provides lengthy evidence for the proposed explanation.

B. The study provides compelling evidence for the proposed explanation.

C. The study provides preliminary evidence for the proposed explanation.

D. The study provides familiar evidence for the proposed explanation.

Answer: (B)

Explanation

“Compelling evidence” is evidence that strongly persuades people to accept a conclusion. “Familiar” and “lengthy” describe other qualities, while “preliminary” indicates an early stage of investigation rather than persuasive strength.