The fire was so strong that the firefighters couldn’t get it under control, so some soldiers were _______ to help put out the fire.
It is ___ to be late.
Great men never give up ___ difficulty.
It is ____ great pleasure for me to be praised in public.
They elected Lincoln ___ president of the United States.
She is very good at playing ___ piano and now she is teaching ___ piano at a music school.