1．(教材P26)So how has this come about and does it matter?

　　那么，这是怎么产生的呢？会产生什么影响吗？

　　come about发生；造成

　　How does it come about that ...?

　　某事怎么发生的......？

　　①The argument came about when they talked about how snakes produce poison.

　　他们在讨论蛇是怎样产生毒液时产生了争论。

　　②How did it come about that he failed in the exam?

　　他考试失利是如何发生的呢？

　　[名师点津]　 come about是不及物动词短语，不能接宾语，也没有被动语态。主语一般是物。

　　[辨析比较]

　　come about, happen, break out, take place, occur　

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 happen 作"发生；碰巧"解，常指具体事件的发生，特别指那些偶然的或未能预见的"发生"，一般用于偶然或突发性事件 break out 意思为"发生；爆发"，常指战争、灾难、疾病或者争吵等事件的发生，也可以表示突然大声叫喊等 take place 通常指"(某事)按计划进行或按计划发生"。此外还有"举行"之意 occur 可指"偶然发生"，也指"计划发生某事"；还表示"突然想到"，常用于it occurs to sb. that ...结构中 　　

　　选择上述词语填空

　　③Do you know how the air crash happened?

　　④The wedding will take place in this church.

　　⑤I'll never understand how it came about that you were late three times a week.

　　⑥A fire broke out in the hospital at midnight.

⑦It suddenly occurred to me that there would be a meeting the next day.