Nobody wanted to __________ matters for him though everyone knew that he was blameless.[ ]

_____ maths is concerned, Tom is the best student in our class.[ ]

We all know how wonderful you are. There is no need to .

The result what he said would lead _____ his regret in the future.

_____ the police thought he was the most likely one, they could not arrest him since they had no exact proof about it