1: (-): I didn't go to Vung Tau last summer vacation.
(?): Did you go to Vung Tau last summer vacation?
2: (-): She didn't have a lot of friends in Nha Trang.
(?): Did she have a lot of friends in Nha TRang?
3: (-): His uncle didn't him to see Cham Temples.
(?): Did his uncle take him to see Cham Temples?
4: (-): Liz didn't buy lots of souvenirs.
(?): Did Liz buy lots of souvenirs?
5: (-): I wasn't very tired after the trip.
(?): Were you very tired after the trip?
6: (-): I didn't eat crabs and fish for lunch.
(?): Did you eat crabs and fish for lunch?
7: (-): Liz didn't teach Ba some English.
(?): Did Liz teach Ba some English?
8: (-): It wasn't very cold yesterday.
(?): Was it very cold yesterday?
9: (-): There weren't many beautiful posters on the wall.
(?): Were there many beautiful posters on the wall?
10: (-): Ba couldn't swim when he was a student.
(?): Could Ba swim when he was a student?
