nowadays,maketing strategy differs greatly from()A.that past B,past C.that of past D.the past答案给的是D,C为什么不对?

that of 中that 是特指。而句子中前面没有特指的东西。

如果选C 应稍加改动即：nowadays, marketing strategy differs greatly from that of the past .
maketing---marketing.
that of 可以省略。past需要特指 .因为past有所指，但省略掉了实际指的是past maketing strategy 。
即：nowadays, marketing strategy differs greatly from that of the past maketing strategy .
如果没有the 那么past就成了或者说就可以是任意的、任何的past(过去).

that 通常指代 前文提到的同一事物,如
The population in China is much larger than that in Japan.
that 与 population 指的是同一事物.
而这道题中 现在的marketing strategy 与过去的不同(differ),因此不能用 that.
可以说marketing strategy differs greatly from the one in the past.
D选项也是对的.

D 这里的The表示特指，加在past前用来表示maketing strategy的过去