题目内容：

We 什么 football when it began to rain.

优质解答

We (were playing) football when it began to rain.我们正在踢足球时,这里天突然下起雨来.这是一个固定句式前面用进行时,后面表达突然另一件事情发生了.I was reading in the room when I suddenly heard a loud ex...