the milk was什么over the floor？

1. the milk was什么over the floor？

The milk was "spread " over the floor.

2. therewerebitsofpaperalloverthefloor什么意思

there were bits of paper all over the floor
地板上到处都是纸张
双语例句
1
The Queen's coach was broken into a thousand pieces, andthere were bits of wood and clothes and bodies everywhere.
女王的马车被炸得粉碎，到处都是碎木头、破布条和碎尸块。
 
2
Brennan-who is leading a White House investigation into theincident-told ABC's This Week there were bits and pieces ofinformation about the suspect, but no definitive evidence. 
在白宫，领导这一事件调查工作的布伦南对美国广播公司的“本周”节目说，我们已经有了关于这名嫌疑人的一些情报，但是还没有确凿证据。

3. there is water all over the floor中all是什么语法结构

你好
这里的all 没有啥语法结构。all 本身也没有啥语法结构
all over 是一个固定短语搭配
all over    英[ɔ:l ˈəuvə]    美[ɔl ˈovɚ]    
到处;历;周遍;浑身    
[例句]Less than a month later , it was all over.
然而，不到一个月之后，一切都结束了。

4. — Things in your room are all over the floor. Be sure to__________before the guests__________.—.

     A          试题分析： 句意：—你房间的东西都散落在地板上。在客人来到之前，应确保收拾整齐。— 没问题。tidy up整理，后面跟名词时，在up之前，之后均可，跟代词作宾语时，只能放在up之前，再有，arrive是不及物动词而reach是及物动词，故选A。考点: 考查动词短语和动词词义辨析的用法。    

5. It's no use crying over the split milk中split 是名词还是动词？

split在这里既不是名词，也不是动词。它可以看做一个形容词。实际上是过去分词作定语，具体你可以参考一下非谓语动词的内容