`1.` Last saturday, Nam and Tuan went to the book fair near their school.

`=>` Dấu hiệu: Last Saturday, there was...school(dòng `1`)

`2.` They met a lot of their classmates.

`=>` Dấu hiệu: We met a lot of our classmates. (dòng `2`)

`3.` Yes, they did

`=>` Dấu hiệu: Then we bought some books (dòng `3`)

`4.` No, he didn't

`=>` Dấu hiệu: Tuan likes detective story (dòng `4+5`)

`5.` Yes, they did

`=>` Dấu hiệu: We enjoy the book fair very much (dòng `7`)

1. They went to a book fair 

2 They met a lot of our classmates 

3 Yes, they did

4 No, he didn't

5 Yes, they did

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