当我们不知道如何解决问题时,可以向老师寻求帮助.(how to…)
When the (暴风雨) came, he was watching TV at home.
As we all know, the sun (升起) in the east.
March is the (第三) month of the year.
(春天) is coming.Everything comes back to life.
The first day in a week is (星期天).