< >there are a fire drill yesterday 找出下列错误的并改正
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![< >there are a fire drill yesterday 找出下列错误的并改正](/uploads/image/z/11836617-33-7.jpg?t=%3C+%3Ethere+are+a+fire+drill+yesterday+%E6%89%BE%E5%87%BA%E4%B8%8B%E5%88%97%E9%94%99%E8%AF%AF%E7%9A%84%E5%B9%B6%E6%94%B9%E6%AD%A3)
< >there are a fire drill yesterday 找出下列错误的并改正
< >there are a fire drill yesterday 找出下列错误的并改正
< >there are a fire drill yesterday 找出下列错误的并改正
are改成was
are 改 was
因为
1.a fire drill 是单数
2.yesterday 是昨天。过去式