Ngữ pháp Tiếng Anh Lớp 11 Global Success - Modal verbs of obligation and permission (Có đáp án)

Answer key 
1 
1 can’t 
2 must 
3 need to 
4 mustn’t 
5 don’t need to 
6 doesn’t have to 
2 
1 doesn’t have to 
2 mustn’t 
3 don’t have to 
4 mustn’t 
5 have to 
6 don’t have to 
3 
Model answers 
Swimming pool 
1 You mustn’t run. 
2 You have to wear a swimming hat. 
3 You need to put your clothes in a locker. 
4 You can jump in at the deep end. 
Cinema 
1 You mustn’t use your mobile phone. 
2 You have to show your ticket before you go into the cinema. 
3 You need to sit in the seat number that your ticket shows. 
4 You can eat sweets and crisps. 
Museum 
1 You mustn’t take photos. 
2 You don’t need to buy a ticket – it’s free! 
3 You can eat and drink in the café, but not in the museum. 
4 You have to talk quietly. 
 © Pearson Education Limited GSE 42-53