Every possible means _____ to prevent the air pollution, but the sky is still not clear.
____, he never seems able to do the work beautifully.
Not only ____ working hard, but also ____ very polite.
——You seem to be an actor. ____ . I have played many parts in a lot of films.
____ a nice man ____ that we all believe him.
_____ that we all went out, lying in the sun.