1. I have never tried (never try) Korean food before.

Explanation:  → Present Perfect is used because this is a life experience with the word never, and the time is not finished.

2. She has worked (work) here for five years.

Explanation:  → Present Perfect + for shows an action that started in the past and continues now.

3. She has seen (see) that film three times.

Explanation:  → Present Perfect is used because it’s an experience that happened at an unspecified time in her life.

4. They bought (buy) a new car last month.

Explanation:  → Past Simple is correct because last month is a finished time expression.

5. Have you ever been (be) to Egypt?

Explanation:  → Present Perfect is used with ever to ask about life experience.

6. I met (meet) him at a conference two years ago.

Explanation:  → Past Simple because two years ago is a finished time in the past.

7. He has travelled (travel) to many countries in his life.

Explanation:  → Present Perfect because it describes general life experience.

8. I lost (lose) my wallet yesterday.

Explanation:  → Past Simple because yesterday is a finished time expression.

9. She has already finished (already finish) her homework.

Explanation:  → Present Perfect with already shows that the action is recently completed and the time is not specified.

10. They moved (move) to London in 2021.

Explanation:  → Past Simple because 2021 is a specific, finished year.

11. Have you tried (try) sushi before?

Explanation:  → Present Perfect + before asks about life experience.

12. My parents visited (visit) us last weekend.

Explanation:  → Past Simple because last weekend is a finished past time.