Recent studies have discovered that fathers uniquely contribute to the development of their children, _____ in low income families.

— You keep on coughing. What’s the matter? —  Oh, I’ve got a cold. Nothing serious, ____.

I might fail, but _______ I insist on doing it. I don’t mind what the result will be.

She devoted herself ______ to her research and it earned her a good reputation in her field. 

We should ________ adjust ourselves to the development of our society.