in short和in brief区别?一道英语选择题.There is not much time left,so I'll tell you about it ____.A in allB in briefC in detailD in shortin short 也有简而言之的意思的话,那不是BD都可以了?

在表示总之，简言之来作对话题的总结时，in brief= in short.但是此处表示因时间不多，所以 I will tell you about it without giving details.所以只能用in brief

选B
in brief 肯定等于in short
但in short 并不一定是in brief的意思
You can say in brief to indicate that you are about to say something in as few words as possible or to give a summary of what you have just said.(你可以用in brief来指代你将要用尽量少的语言来说的东西，或者对你已经说了的东西概括）
You use in short when you have been giving a lot of details and you want to give a conclusion or summary.（当你已经给了很多细节，但是你还想给出一个结论，时用in short ）
[Cobuild Dictionary 2006]
in brief
a) in as few words as possible（用尽可能少的语言）
We should, in brief, invest heavily in digital systems.
b) without any details（不拖延）
Here again are today's headlines in brief

In brief.虽然short 也有简略的用法,但是前面不加in,而且只能在特定词组里用,比如：I'll make it short,我简单说一下,to make a long story short,简单介绍以下情况.
总而言之,short,本身没有简略的意思,只能在特定情况下用,而前面加in不是特定情况之一.

in short 主要是指把原来比较长的事物截短，for example Tom is in short of Thomas一般是指对具体的事物的简短
in brief是指简明的说，可以把原来冗长的话简而言之，对象一般是抽象的事物