昨天我旷课了.用英语怎么说?

I was absent from school yesterday。
再问： 再问一下：去年在这个公园有成百上千的人。用英语怎么说？ 前天（the day before yesterday），我花了十个小时做作业。用英语怎么说？
再答： There were thousands of people in this park last year。 I spent ten hours doing homework the day before yesterday。