I thought she was famous, but none of my friends have ______heard of her.      

---- You don’t go to that supermarket quite often, do you?  ---- No, I only go there ______ because it’s too far away from my house.

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

The final score of the basketball match was 88-90. We were only      beaten.

We must behave ____ at a formal table.