请教一题OG语法

GMACkiller

37.    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这道题，虽然习惯用法是as many as, 可是我找不到主语嘛，到底哪个是主语

jingnnee

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

选A吧，省略了主语。than 和 as 都可以在主语和主语在比较的情况下，省略后面主语，直接接谓语。

GMACkiller

所以说这道题没有主语咯

jingnnee

Americans were killed in one of the bloodiest battles of the Civil War, (fought at Sharpsburg, Maryland, on September 17, 1862, )  four times as many as be killed later on the beaches of Normandy during D-Day.
主语 Americans ，应该是这样的吧~