When one door of happiness closes, another opens;But often we look so long at the closed door that we do not see the one which has been opened for us. 当幸福的一扇门关闭时,另一扇会打开,但我们常常盯着那扇关闭的门,却没有注意到另一扇打开的门。
blue忧郁的 when I feel blue at night/in the night. All I have to do is dream.All one have to do,all one does,what one have to do ,what one does等作主语时,后接be动词,再接不定式做补语时,to可以省略。