1. I have never met him before → It................................................................................................................................................. 2. I have never eaten this kind of food before → It is.............................................................................................................................................. 3. I’ve never seen this film before → This.............................................................................................................................................. 4. We’ve never drunk this kind of water before → This is........................................................................................................................................... 5. He’s never been to HCM city before → It is............................................................................................................................................... 6. It is the first time I’ve seen this man → I’ve............................................................................................................................................... 7. This is the first time he phoned me. → He has............................................................................................................................................ 8. This is the first time I’ve talked to her → I’ve................................................................................................................................................ 9. This is the first time Nam has used computer → Nam has......................................................................................................................................... 10. It is the first time Tom has sung → Tom has......................................................................................................................................... 11. Ba has never listened to classical music before → This is........................................................................................................................................ 12. Nam has never seen her before → It is............................................................................................................................................. 13. I have never talked to him before → It is............................................................................................................................................. 14. It is the first time Ba has killed chickens → Ba has........................................................................................................................................... 15. It is the first time she has eaten apples → She has.........................................................................................................................................