He was knocked down by a car and badly ______.
Only ______ the painting _______ decide whether it is worth buying.
When he joined them in the work, he was disappointed at there _______ so little to do.
He had a strange hairstyle and he instantly became the ______ of attention the moment he stepped into the classroom.
More money and effort should be spent to _______ the cultural relics in the world.
In communication, a smile is usually _____ strong sign of a friendly and _____ open attitude.