I was about to leave the office ______ the telephone rang．So I stopped ______ it．

Colours can change our moods and make us happy or sad .

he hasn’t achieved the goal, heisn’t a failure. _____ , he is a true man indeed.

________ the heavy snow came, the weather got colder and colder.

By nine o’clock, all the Olympic torch bearers had reached the top of Mount Qomolangma, _______appeared a rare rainbow soon.