shanghai has experienced such great changes that everyone can recognize that it is no longer

shanghai has experienced such great changes that everyone can recognize that it is no longer__

A what it used to B. that it used to like C. tha same it used to be D. what it used to be 选什么和为什么，谢谢！

答案是D
what it used to be
what引导表语从句，是一个名词性从句。
what引导名词从句时，=the + n + that
相当于：It is no longer the city that it used to be
I am no longer what I used to be（我不再是过去的那个人了）
=I am no longer the person that I used to be.
A结构不全，to+v
Blike喜欢的意思
C 改为the same as it used to be就对了。

选D.IT USED TO BE -正如它以前的样子

你好！ 要填的部分做it is 的表语 所以要填个名词性的成分 只有d符合条件 百度教育团队【海纳百川团】为您解答 如满意，请点击“选为满意答案”按钮，谢谢～

D.本句很显然再问一个状态 并且是过去的老状态 A，把他变成陈述语序 是it used to what 和明显 少了个be B longer 之后的 that 很明显只是一个代词引导表语从句 而前面并无其指代成分 并且used to be是固定用法 翻译为 过去的是（状态）所以之后不跟like C、the same 之后就变为了一个同位语 that不能省略 所以之后跟 that D 、A的改进版 翻译成 过去的样子