There are a fire drill yesterday.
问题描述：
There are a fire drill yesterday.
找出句子中的错误并改正
We must walk quick down the stairs.
They are talked about the weather because they are going to have a picnic.
You mustn't eat and drink on the bus.
答
改为There was a fire drill yesterday.We must walk quickly down the stairs. They are talking about the weather because they are going to have a picnic. You can't eat and drink on the bus.