NN别走，帮忙看看大全真题14

14.   In 1990’s, there are more babies born by women over thirty years old than under it.

(A) than under it

(B) than were they under it

(C) than had been under it

(D) than were the babies（A）

(E) than those were under it

A, 主语谓语都相同时的比较可以将主谓同时省略

这里的语法现象？能否解释一下??什么时候用介词短语的比较啊？

语法现象？好笼统的概念。

介词短语的比较如你自己所言，当比较对象的主谓相同，如果其差异在于介词部分，那么，可以省略主谓，而只保留比较的差异部分：介词短语。如此句： In 1990’s, there are more babies born by women over thirty years old than (babies born by women) under it 括号内为省略部分。