请教专家：

Looking into the drawing room, she saw a scene of confusion over by her writing desk. It was as clear as daylight then that burglars had forced an entry during her absence. Her first impulse was to go round all the rooms looking for the thieves, but then she decided that at her age it might be more prudent to have someone with her, so she went to fetch the porter from his basement. By this time her legs were beginning to tremble, so she sat down and accepted a cup of very strong tea, while he telephoned the police. Then, her composure regained, she was ready to set off with the porter's assistance to search for nay intruders who might still be lurking in her flat.

They went through the rooms, being careful to touch nothing, as they did not want to hinder the police in their search for fingerprints. The chaos was inconceivable. She had lived in the flat for thirty years and was a veritable magpie at hoarding; and it seemed as though everything she possessed had been tossed out and turned over and over. At least sorting out the things she should have discarded years ago was now being made easier for her. Then a police inspector arrived with a constable and she told them of her discovery of the ransacked flat. The inspector began to look for fingerprints, while the constable checked that the front door locks had not been forced, thereby proving that the burglars had either used skeleton keys or entered over the balcony.

1)  It was as clear as daylight then that burglars...是强调句的话，怎么还原到原来的句型呢？感觉少了一个that.

2)  现在分词looking for是目的状语还是伴随状语？现在分词短语thereby proving是结果状语？还是非限制性定语从句（这里准确说应该是非限制性关系从句？）？

3)  我感觉这里的by this time = at this time, 对吗？另外，was now being made 为什么要用进行时，而不是一般时was now made 呢？

谢谢老师。