while we__(wait) for the bus ,a girl ___(run) up to us 应填什么为什么?
问题描述:
while we__(wait) for the bus ,a girl ___(run) up to us 应填什么为什么?
答
were waiting.ran
while we__(wait) for the bus ,a girl ___(run) up to us 应填什么为什么?
were waiting.ran