14. My parents always refuse to allow me to stay overnight at my friend’s house.

-> They never let me to stay overnight at my friend house

   let somebody/something do something:cho phép ai,để ai làm j

15. It is not necessary for me to follow what my older brother says. (have to)

->I don't have to follow what my older brother says.

(Tôi ko cần phải làm theo bất cứ thứ j mà anh trai tôi nói)

16. Parents are advised to spend more time talking with their teenage children. (should)

->Parents should spend more time talking with their teenage children. 

   Advise=should(not) + Vinf…

17. Parents/ often/ remind/ children/ show respect/ the elderly/ greeting them/ or helping them/ whenever possible.

->Parents often remind their children to show respect for the elderly by greeting them or helping them whenever possible. 

 remind somebody to do something: nhắc nhở ai làm gì

- (show) respect (n) for somebody/ something: (thể hiện) sự kính trọng, sự tôn trọng dành cho ai/ cái gì

- by doing something: bằng cách làm gì

- look after: chăm sóc

18. It is very important for us not to go out during the violent storm. (must)

->We musn't go out during the violent storm.

(Chúng tôi không được phép ra ngoài trong cơn bão dữ dội.)