It is no use _________ to persuade him ________ smoking because he has been addicted to it since he wasyoung.
People traveling long distances frequently have to decide ______they would prefer to go by land, sea or air.
It is ____ fashion differs from country to country ____ may reflect the cultural differences.
——What made him so upset?——______she failed in her examination
He said______ his sister had passed the entrance examination of college, and______she would go to college in about 20 days.
Mr. Smith was so angry at all ______ Bill was doing ______ he left.