187. In one of the bloodiest battles of the Civil War, fought at

Sharpsburg, Maryland, on September 17, 1862, four times as many

Americans were killed as would later be killed on the beaches of

Normandy during D-Day.

(A)Americans were killed as

(B)Americans were killed than

(C)Americans were killed than those who

(D) more Americans were killed as there

(E)more Americans were killed as those who

答案为A，看过讨论区，可以理解AS后省略了americans，但是想问这句话的

主语和谓语分别是什么？实在找不出。

主语是Ameircans, 谓语是were killed

as would later be killed on the beaches of Normay during D-Day是狀语, 用来修饰前面的主句, Americans were killed.