Задание 5.Progress Check.6 .Spotlight, 11 класс, Английский язык,О.В. Афанасьева,ГДЗ

Помогите заполнить:
Fill in the gaps with the correct preposition.
 
1      Our teacher insists......... correct punctuation.
2       He has been complaining ............  backache for
several days now.
3       The new employee assured his boss .............  his
complete honesty.
4       Don’t apologise....... breaking the vase. I didn’t
like it anyway.
5       Danny’s always complaining ......  not having
enough money.