Practice more, ________ you’ll do better in playing chess.

The earth will become worse and worse ________ we do something to stop her from being polluted.

       Tony       Frank likes three-D films. They think it is harmful for their eyes.

Uncle Tetsu（彻思叔叔）cheese cakes sell well____they are so nice.

—      good time we had at the party last night!— Yes． It was         exciting party that I would never forget it．