Люди помогите пожалуйста английский 8 класс Михеева Упр 24

Exercise №24.
1) If only the students hadnt missed the 8:45 train!
2) If only the Johnsons had arrived on time at the weekend!
3) If only Lucy hadnt posted the letter last Friday.
4) If only John had been at home when I phoned him!
5) If only it hadnt been that cold in Novosibirsk last winter!
6) If only the children hadnt quarreled yesterday!
7) If only my son hadnt lost the keys two days ago!
8) If only Betsy had cooked dinner yesterday!
9) If only the political situation in the country hadnt been so dangerous last August.
10) If only they hadnt stolen my new bicycle!