1.(-):G.Khanh and M.Khanh weren't on Sam Son beach with Linh.
(?):Were G.Khanh and M.Khanh on Sam Son beach with Linh?
2.(-):My father wasn't good at English when he was at school.
(?):Was my father good at English when he was at school?
3.(-):His brothers weren't lawyers 3 years ago.
(?):Were his brothers lawyers 3 years ago.
4.(-):My grandparents wasn't 75 years last year.
(?):Was my grandparents wasn't 75 years last year?
5.(-):It wasn't very cold last month.
(?):Was it very cold last month?
