题目They used to be good friends but now they are like strangers.How( )this( )? A.did;come about B.did;happen to C.was;ended up D.was;happened 应该选择A，可是不知道为什么。所以想问一下这几个词语的用法区别在哪里.
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. Do you know how the air accident came about? 你的题They used to be good friends but now they are like strangers.How( )this( )? A.did;come about B.did;happen to C.was;ended up D.was;happened 他们曾经是很好的朋友，但是现在像陌生人一样。这是怎么发生的？如果要选B的话，应该是How did this happen?C选项，end up是结束，不符合语境。 D选项，happen是实义动词，提问是应该用did而不是was。
