杭州交通信息网是一部内容开放、自由的互动网络百科全书客观、专业、权威的知识性百科全书
来源:百度文库 编辑:杭州交通信息网 时间:2024/05/09 17:59:58
We were holding an athletic meeting while it had begun to rain.
It was raning when we held the sport meeting yesterday.
We were holding the sports meeting when it began to rain yesterday.