Above board

At arm's length- (কাছাকাছি রাখা)→ Keep yours first aid box at your arm's length.

Before long- (ভবিষ্যতে)→  If we keep sending so much, before long we'll be without any money.

On and on- (এক নাগারে চলতে থাকা) →  The speech continued on and on until we finally left the meeting.

In the lap of Gods- (আয়ত্তের বাইরে) → Death is in the lap of the Gods because we can' not control our life.