mng giúp mik với Exercise 1 : Mai works for a travel company. Now; she is meeting two clients, John and Mary, who are on holiday in Ho Chi' Minh City. Complete the conversation using the present perfect of the verbs in brackets. Mai : How is your hotel? John : Great! It's the best hotel I 've ever stayed……………………( ever/ stay) in. Mary : Yes. John is really pleased. He ……..( never / sleep) in such a comfortable bed before. But he won't be so pleased when we get the bill. Itts also the most expensive hotel we …..( ever / stay) in! Mai :…………(3. you / be) to thié city before, John? John : No I…….. (4. not / be) here before, but Mary a have been a number of times. Haven't you, Mary? Mary : That's right. But the last time was five years ago and this city ………(6. change) a lot since then, Mai : .And what are you going to do this afternoon? Mary: well, I ……….(7. never / see) Cu Chi Tunnel. We (8. hear) ………a lot about it from friends, so we thought wed go there. Mai : I see. And what about dinner tonight? I Imow a very good Vietnamese restaurant._________(9. you / ever / eat) Vietnamese food, Mary?