there were a fire drill yesterday,那里有错,为什么?

there were a fire drill yesterday,那里有错,为什么? There are a fire drill yesterday. There were a fire drill yesterday.请问哪里有错误怎么改 There a fire drill yesterday这句错在哪? < >there are a fire drill yesterday 找出下列错误的并改正 改错There is a fire drill tomorrow afternoon. There is going to be a fire drill next week. A fire drill 的英文作文 英语作文：fire drill chinese fire drill fire drill的近义词 fire-drill是什么意思