shanghai has experienced such great changes that everyone can recognize that it is no longershanghai has experienced such great changes that everyone can recognize that it is no longer
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答案是Dwhat 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.
======以下答案可供参考======
供参考答案1:
d. what 引导的宾语从句
供参考答案2:
选D.IT USED TO BE -正如它以前的样子
供参考答案3:
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