13. They prefer (wear)______wearing________modern clothes because of their convenience.

vì prefer V-ing.
14. He detests (cook) _________cooking________________ for a big family.

vì detest V-ing.
15. She (just finish)______has just finished___________her work.

vì just là HTHT.
16. They don’t mind (wait)____waiting___________but they’d rather you came on time

vì mind V-ing.

17.Mai adores reading comics. (on)
- Mai is keen on reading book.

vì adore = tobe keen on.
18. Training pets is not easy.
- It’s difficult to train pets.

vì not easy = difficult và sau tính từ to V.
19. It took us two hours to make this bracelet.
- We spent two hours making this bracelet.

vì It took Sb time to V = S spent time V-ing: dành bao nhiêu thời gian để làm gì.
20. We haven’t listened to the radio since last year.
- The last time we listened to the radio was last year.

vì S+ haven't/ hasn't Vp2+ time ago = The last time S V2 was time.