Terms for subject General containing at the first opportunity

English	Russian
at the first convenient opportunity	при первом удобном случае
at the first opportunity	при первой же возможности (I will do it at the first opportunity. В.И.Макаров)
at the first opportunity	при первой возможности (I will do it at the first opportunity.)
I'll do it at the first opportunity	я сделаю это при первой возможности
make to bolt of it at the first opportunity	удирать при первом удобном случае (Interex)