6. I have never visited this museum before. This is ____________________________________________________________ 7. I think that no city in the world is more beautiful than Paris. - I think Paris __________________________________________________________ 8. She has never seen a more unusual festival than this. This is the most ___________________________________________________ 9. This question is difficult to understand. It’s _______________________________________________________________ 10. He hasn’t chatted with his classmates through the internet for ages. It’s ages ___________________________________________________________

`6`.This is the first time I have visited this museum

`\rightarrow` This is the first time + S + have / has + V3 / PII : Lần đầu tiên làm gì

`7`.I think Paris is the most beautiful city in the world

`\rightarrow` So sánh nhất : S + be + the adj-est / the most adj

`8`.This is the most unusual festival she has ever seen

`\rightarrow` This is the adj-est N / the most adj N + S + have / has + ever + V3 / PII

`9`.It's difficult to understand this question

`\rightarrow` It is ( not ) + adj + to do sth : Như thế nào để làm gì

`10`.It's ages since he last chatted with his classmates through the Internet

`\rightarrow` It's + time + since + S + last + Ved / V2 : Đã là ... kể từ khi ...

`\text{@ TheFox}`