It's time to do sth. 是时候做某事了。
该起床了!It's time to get up.
该上学了!It's time to go to school.
该回家了!It's time to go home.
该吃早饭/午饭/晚饭了!It's time to have breakfast/lunch/dinner.
该写作业了!It's time to do your homework.
该睡觉了!It's time to go to bed/sleep.
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