She wore,(what )was very uncommon in the country,a pair of white shoes.不用which 和that 的原因

She wore,(what )was very uncommon in the country,a pair of white shoes.不用which 和that 的原因
She wore,(what )was very uncommon in the country,a pair of white shoes.
不用which 和that 的原因

She wore,(what )was very uncommon in the country,a pair of white shoes.不用which 和that 的原因
She wore,(what )was very uncommon in the country,a pair of white shoes.
不用which 和that 的原因
答：as
译：她穿着一双白鞋,这在这个国家是非常不寻常的.
分析：非限制性定语从句,指代全句,which引导要放在整句的后面,指代某个名词可以在中间.as可以这么用.还可以放主句前.
that 不引导非限制性定语从句.
What在此是错的.楼上的不要将错就错.what 从句是名词性从句.
你的题目中如果没有as,而答案用which,是题目本身设计有误,如用what,更是错上加错.
最好是：She wore a pair of white shoes,which was very uncommon in the country,

不管用which 和that 这个句子就变成了非限制性定语从句， that是不可以引导非限制性定语从句的。which可以引导非限制性定语从句，但必须放在所修饰词的后面。所以无须进行其他分析，这两个词都不能用。

这里要主语，所以不用that
在这个国家罕有的不仅是她那双白鞋，而是所有的白鞋，which是特指她那双鞋，不符合题意，what统指所有的白鞋，符合。
~O(∩_∩)O

She wore, what was very uncommon in the country, a pair of white shoes.