The radio spreaded the news as soon as it happened.

it aired

在新闻刚发生的时候，广播就把它传播了出去。

The radio spreaded the news as soon as at happened.

应该是the radio spreads the news as soon as it happened.
因为当某件事情刚刚发生后，广播就立刻转播这个新闻了。
因为处于‘正在转播’状态中，所以要用spreads而不是spreaded.
spreaded只能用在已经发生的事情后，
不是正在发生的时候。
如果是spreaded的话，那么这个句子就应该是：
the radio spreaded the news that had happened，
而没有as soon as it happened.
嗯……明白了吗？