He is of confidence, , in my opinion, is most important in society.

She saved her money ___she might buy a color TV set

Until today we have reached a stage ______ we have almost no rights at all..

income worry is _______ rather common problem of the aged, loneliness is another problem that _______ aged parents may face.

the air to hold some of the sun’s heat,the earth at night ________, too cold for us to live.