When I cross the street,I see two boys____ there空里填什么
问题描述：
When I cross the street,I see two boys____ there空里填什么
When I cross the street,I see two boys____ there空里填什吗跪求！！！
答
see sb.doing/do sth.,
When I cross the street表示一个时间点,所以用doing,即你所说的playing