4. She goes to work at eight forty-five
⇒ She goes to work at a quarter to nine
5. Would you mind telling me the way to the national Museum?
⇒ Can you tell me the way to the national Museum?
6. Vietnamese students have fewer vacations than american ones
⇒ American students have more vacations than Vietnamese ones
7. It's against the rules to use your mobile phone in class
⇒ You aren't allowed to use your mobile phone in class
8. We have a two-month summer vacation
⇒ Our summer vacation last 2 months
9. It's a good idea to listen to the weather forecast before going camping
⇒ You suggest listening to the weather forecast before going camping
10. Nam isn't so good at english as minh
⇒ Minh is better at English than than Nam