9. They didn't use to know how to make a cake
10. Susan used to drink a glass of milk every morning when she was a child
sử dụng cấu trúc use to để nhấn mạnh sự khác biệt giữa hiện tại và quá khứ.
11. Rachel's mother paid for the meal which was very kind of her
12. Vicky didn't get the job which made her very depressed
14. David passed his driving test which surprised everybody
15. She drank a cup of coffee which means she couldn't sleep last night
sử dụng which như là từ nối
