定语从句与先行词被分隔的语法现象是存在的，分隔有时是为了保持句子结构平衡，有时是为了突出强调。本句话是被从句的主语分隔，突出强调high score的重要性。以下几个例句可供参考：

Mr．Leon said in the future，computer would be developed which would be small enough to carry in the pocket．（被谓语分隔）

Never say anything behind a person's back that you wouldn't say to his face．（被状语分隔）

No doubt there are questions of principle involved which can not be ignored and underestimated．（被非从句定语分隔）

定语从句的分隔现象

 一般地,定语从句都紧跟在它所修饰的先行词之后,但有时在先行词和定语从句之间会出现其它一些词语,使两者隔离开来。定语从句的分隔有下面几种情况: 

【1】在先行词和定语从句之间插入另一个定语短语
Do you remember one afternoon ten years ago when I came to your house and borrowed a diamond necklace?
你还记得十年前的一天下午我在你家借钻石项链的事吗?

(when 引导的从句修饰one afternoon,ten years ago也是定语,修饰 one afternoon .)
We often say that there are no places lefted on the earth where the foot of man has not trodden.
我们常说,地球上没有地方是绝无人迹的.

(where引导定语从句,其先行词为no places。过去分词短语lefted on the earth 是定语,也修饰no places ) 

【2】在先行词和定语从句之间插入另一个状语短语
There are many thousands of stars in the sky that are like the sun.
天空中有成千上万颗像太阳一样的恒星。

(that引导的定语从句修饰先行词stars。in the sky 是主句中的地点状语。) 
There is no student in our class who does not study hard.
我们班上每个同学都在努力学习。

(who 引导的从句修饰先行词 no student。 in our class在主句中作地点状语) 

【3】作主语的先行词后带一个定语从句,而句子的谓语又比较短(比如是被动语态,不及物动词),此时,常将定语从句移到句子后面,以避免头重脚轻,保持句子平衡
All is not gold that glitters.
发光的并不都是金子。

(定语从句 that glitters修饰all被后移),
The day will come when the Chinese set foot on the moon.
中国人登上月球的日子就要到来。

(定语从句when the Chinese set foot on the moon修饰The day 被后移)
【4】在先行词和定语从句之间插入一个插入语
The reason,believe it or not,why he was late was really true.
不论相信与否,他迟到的理由确实是真的。