When did the flood in your hometown____ _____(发生)?

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Whendidthefloodinyourhometown_________(发生)?Whendidthefloodinyourhometown_________(发生)?Whendidthefloo

When did the flood in your hometown____ _____(发生)?
When did the flood in your hometown____ _____(发生)?

When did the flood in your hometown____ _____(发生)?
come about
come about 表示:发生,产生.而take place 发生,指人为的,事先有安排、计划的,所以这里用come about正确.比如:
How did the accident come about?
这个事故是怎么发生的?
用take place 不当,可能是出题人考虑不周.
come about与happen、take place的区别:
(1)take place 一般指非偶然性事件的“发生”,即这种事件的发生一定有某种原因或事先的安排,例如:
Great changes have taken place in our hometown during the past ten years.
The Olympic Games of 2008 will take place in Beijing.
(2)happen一般用于偶然或突发性事件,例如:
What happened to you?(一般不说:What did you happen?)
Maybe something unexpected happened.
I happened to see him on my way home.= It happened that I saw him on my way home.
(3)come about表示“发生、产生”,多指事情已经发生了,但还不知道为什么,常用于疑问句和否定句,例如:
When Mother woke up,she didn’t know what had come about.
I’ll never understand how it came about that you were late three times a week.

happen