1. The boy is said to have been saved.

2. He was allowed to leave after they have questioned him/ after being questioned.

(let = allow to: cho phép ai đó làm gì)

3. She doesn't have enough money to go that foreign trip.

(cấu trúc: S+V+enough+N+(for sb)+to V)

4. They have heard from her for ages.

5. The car is so expensive that he can't buy it.

(cấu trúc so...that...)

The car is not cheap enough for him to afford. (mình nghĩ câu này cũng hợp lí á)

6. Despite the lack of experience/ Despite not being experience, they got the job.

(lack of: thiếu)

7. It's difficult to find a house in this city.

`1` The boy is said to have been saved.

`2` He was allowed leaving after they have questioned him questioned.

Vì cấu trúc: let Sb V-inf = allow V-ing.

`3` She doesn't have enough money to go on that foreign trip.

Cấu trúc: S+ be/ V+ enough+ N+ to V.

`4` They haven't heard from her for ages.

S+ HTHT+ for + TG.
It’s + thời gian ….+ since …+ last + QKĐ (khẳng định)

`5` The car is so expensive that he can't buy it.

Cấu trúc so.....that: S+ be+ so+ adj+ that+ clause.

`6` Despite not being experienced, they got the job.

Despite+ V-ing/ N phrase.

`7` It's difficult to find a house in this city.

Cấu trúc: adj+ to V.