3句英语句子请改错，谢谢

because （of) snow，passengers wait in the terminal until night
因为下雪，旅客们只能在候机厅等到晚上
winners have used most times (used most times 改为spend more time,词和时态都变)to try finished(改为finishing) other 20％（of) the main things
成功人士通常用多数时间努力完成另外20％的主要事情
Dr Douglas is pained (改为所有格形式：Dr Douglas' pain) to cause(to cause 改为result in) their to understand the question profoundly，which who is us
D先生的痛苦使他更深刻的理解了我们是谁的问题
Dr Douglas' pain result in their understanding the question about who we are profoundly.

1.because of snowing，passengers have to be waiting in the terminal until night
2.winners always have been using most times to try finished other 20％ the main things
3.Dr Douglas`s pain causing them to understand the question profoundly，which who is us

一：because后加一个of
二：finished变成to finish
三：which删除

Because of snow, passengers had to wait in the terminal until night.
Winners always use most times to try to finishe other 20％ the main things.

Dr Douglas's pain cause him to understand the question profoundly, which who is us.
（注意开头字母要大写，这也是改错）