想询问下面句子如何改成为名词短语的句子：

The room was silent (silence) except for John's coughing. 

除了约翰的咳嗽，房间里一片寂静 。

The improved farm tools are very efficient (efficiency). 

改良过的农具很有效率 。

This result is consistent (consistence) with the findings of our university. 

这个结果与我们学校调查的结果是一致的。

There was a distinct (distinction) in her attitude. 

她的态度截然不同。