There was a traffic jam (this morning).就括号里内容提问

There was a traffic jam (this morning).就括号里内容提问

很高兴能够在这里回答你的问题：
When was a traffic jam?
或
When was there a traffic jam?
什么时候有一场车祸?

When was there traffic jam?
什么时候发生了一场车祸？

When was the traffic jam?