TOPIK Practice – TOPIK I 어휘 [vocabulary] 1–5 (1/20/2026) – ms

정답: A. 잃어버려서

How to solve: The sentence states that the speaker couldn't call a friend because of the phone. '잃어버리다' means 'to lose an item', which would logically prevent making a call. '잊어버리다' means 'to forget (information or a task)' and typically not for losing a physical object itself in this context.

A — 잃어버려서 (to lose an object) – Correct. Losing the phone means you cannot use it to call someone.

B — 잊어버려서 (to forget information/task) – Incorrect. While one might forget *to bring* the phone (잊어버리고 오다), '잊어버리다' is not used for having an object go missing (losing it).

C — 찾아내서 (to find out/discover) – Incorrect. Finding the phone would allow making a call, not prevent it.

D — 빌려서 (to borrow) – Incorrect. Borrowing would enable a call, not prevent it.

정답: B. 실수

How to solve: The sentence describes something that happens often while doing homework and is usually followed by a verb meaning 'to do/make'. '실수' means 'mistake'. It is common to 'make mistakes' (실수를 하다) while doing homework.

A — 성공 (success) – Incorrect. Success is not something one 'makes' (하다) in this context, nor does it fit the implication of '자주' (often) in a typical homework scenario where '자주 성공하다' isn't as common as '자주 실수하다'.

B — 실수 (mistake) – Correct. It is common to make mistakes ('실수를 하다') while doing homework.

C — 노력 (effort) – Incorrect. Effort is put in ('노력하다' or '노력을 하다'), not 'made' as a direct object of '하다' in this phrase.

D — 시작 (start) – Incorrect. '시작을 하다' means 'to start', which is a single action, not something that happens '자주' (often) repeatedly within the context of doing one assignment.

정답: A. 놓쳤

How to solve: The sentence explains why something happened to the school bus: waking up late. '놓치다' means 'to miss (a bus, train, opportunity)'. Therefore, waking up late logically leads to missing the bus.

A — 놓쳤 (to miss) – Correct. Waking up late results in missing the bus.

B — 탔 (to ride/take) – Incorrect. If you rode the bus, you wouldn't be late or need to explain missing it.

C — 잡았 (to catch/grab) – Incorrect. If you caught the bus, you wouldn't be late or need to explain missing it.

D — 봤 (to see) – Incorrect. Simply seeing the bus doesn't imply missing or taking it, or being late.

정답: B. 틀려서

How to solve: The sentence states that the problem needs to be solved again ('다시 풀어봐야 해요'). This implies that the current answer is incorrect. '틀리다' means 'to be wrong/incorrect'.

A — 맞아서 (to be correct) – Incorrect. If the answer was correct, there would be no need to solve it again.

B — 틀려서 (to be wrong/incorrect) – Correct. If the answer is wrong, it needs to be solved again.

C — 쉬워서 (to be easy) – Incorrect. Being easy doesn't explain needing to solve the problem again.

D — 어려워서 (to be difficult) – Incorrect. Being difficult might explain why one struggles, but not why a specific *answer* needs re-solving unless it was incorrect.

정답: B. 잊어버리고

How to solve: The sentence implies that the bag was left behind because the person didn't remember to bring it. '잊어버리다' means 'to forget (to bring something, or information)'. The '-고 오다' structure signifies that one forgot and then came, meaning they left the item behind.

A — 잃어버리고 (to lose an object) – Incorrect. '잃어버리다' implies the bag is lost and its location is unknown, not that it was simply forgotten and left at home.

B — 잊어버리고 (to forget to bring/leave behind by forgetting) – Correct. This means you forgot to bring the bag when you left, thus leaving it behind.

C — 찾고 (to find) – Incorrect. Finding the bag wouldn't explain leaving it behind.

D — 들고 (to carry/hold) – Incorrect. Carrying the bag contradicts the idea of leaving it behind.