_news came _an unknown disease was spreading in the area.
问题描述：
_news came _an unknown disease was spreading in the area.
为什么是Disturbing/that?
答
Disturbing 表示令人讨厌的 而 that 引导的从句对前面的news进行解释说明第二空为什么不可填which?which一般要在从句中做主语或宾语 而该从句中句子成分齐全 因此不用which