`1` They didn't know where to find information about traditional craft villages.

`-` (cấu trúc: S + didn't know + wh-question + to V): ai đó k biết phải/nên làm gì

`2` Minh comes back to his hometown every year to celebrate Tet with his family.

`-` (to) return = (to) come back: quay về

`3` The traditional way is more complicated than the new technique

`-` (cấu trúc: S1 + be + less/more + adj + than + S2): so sánh hơn với adj dài vần

`4` This homemade sauce is handed down from generation to generation in my house

`-` hand down = pass down: truyền lại

`-` Bị động hiện tại đơn: be + Vpp `>` is handed down

`5` You must not drop litter around tourist attractions in Singapore.

`-` (cấu trúc: must (not) + V: phải/ không đucợ phép làm gì)

`6` The tour guide said that some tourists were joining a free class in making pottery right now.

`-` (cấu trúc: S + said + that + S + V(lùi thì)) `-` cấu trúc câu gián tiếp

`-` Lùi thì are `>` were (HTTD - QKTD); 

`7` They had to call an electrician because the electrical wires broke down after the thunderstorm.

`-` (cấu trúc: ........+ because + S + V: bởi vì)

`-` broke down (phv): hỏng

`8` The community helpers come and look after the orphans every weekend

`-`  look after = take care of: chăm sóc

`9` I'm looking forward to the upcoming pottery workshop.

`-` (cấu trúc: S + be + looking forward to + N/Ving): đang mong đợi làm gì, điều j

`10` The pop star didn't turn up. 

`-` turn up (phv): tới nơi

`11` The teacher asked him to go out because he misbehaved in the class.

`-` ask SO to do ST: yêu cầu ai làm gì

`-` (cấu trúc: ........+ because + S + V: bởi vì)

`12` The students wondered how to carve figures of unicorns on the top of the box.

`-` (cấu trúc: S + wondered + wh-question + to V): thắc mắc làm ntn...

`-` Cấu trúc wh-words `+` to V như câu `1`

`13` Turn the computer off when you leave.

`-` turn off (ph.v); tắt

`14` When I was a child, I used to go to the local park every Saturday afternoon.

`-` (cấu trúc: When + S + was/were + adj, S + used to + V): khi ai đó...(trong quá khứ), ai đó từng làm gì...... (đã k còn tiếp diễn ở hiện tại)