2. I have never seen an elephant.
3. Have you ever acted in a play?
4. Has Elen ever been to China?
5. Billy and Jack have never visited an aquarium.
6. I have never argued with my parents.
7. My friends have never eaten Chinese food.
8. Have they ever swum in the sea?
9. Have you ever seen a film in English?
10. We have never eaten lemon ice cream.