1. If they had taken his advice, they wouldn't meet such difficulties now ( điều kiện hỗn hợp 2 và 3)

2. Not until the teacher went into the class did they stop talking ( đảo ngữ not until)

3. To solve this problem, it is advisible that a strong measure be taken ( take a measure: thực hiện 1 biện pháp)

4. My sister would prefer to watch Korean films rather than listen to Korean music (would prefer + to + V + rather than + V )

5. Heavy traffic often makes it impossible for children to cross the road

Đáp án:

`1`/ If they took his advice , they wouldn't meet such difficulties now.

`->` Dịch : Vì đây chỉ là 1 giả thiết không thể xảy ra `⇒` dùng câu đk loại `2`

`2`/ Not until the teacher went into the class did they stop talking.

`->` Mãi cho đến khi giáo viên vào trong lớp , họ mới ngừng nói chuyện.

`3`/ To solve this problem, it is advisible that a strong measure be taken.

`4`/ My sister would prefer to watch Korean films rather than listen to Korean music.

`->` Công thức : S +would prefer + to + V + rather than + V

`5`/ Heavy traffic often makes it impossible for children to cross the road.

`->` Dịch : Giao thông đông đúc thường khiến trẻ em gần như bất khả thi để sang đường.