4. on ⇒ at: Who did you meet at the party?
5. book ⇒ books: He bought 2 comic books at the book fair.
7.sometime⇒ sometimes: You must go to see me sometimes.
8. person ⇒ people: There are four people in Mr. Phong's family.
10. little ⇒ few: She is going to travel to Thailand for a few days.
11. has ⇒ have : What time does she often have breakfast
chúc bạn học tốt.
Cho tớ xin hay nhất nhé. Thanks