All flights ____ because of the snowstorm, many passengers could do nothing but take the train.
Do you have any idea ________ is actually going on in the classroom?
— Can you give me some advice on what I said just now?—Sorry. My mind ________.
Chemicals in the body ______our food _____ into useful things.
—Peter looked tired and a little absent-minded in class. —He _____ too late.
She’s so ______ that no one can please her.