OG中关于Pronoun的一道题 困惑好久了

kuangzheng

40.        Dr. Tonegawa won the Nobel Prize for discovering how the body can constantly change its genes to fashion a seeming unlimited number of antibodies, each specifically targeted at an invading microbe or foreign substance.

(A)        seeming unlimited number of antibodies, each specifically targeted at
(B)        seeming unlimited number of antibodies, each targeted specifically to
(C)        seeming unlimited number of antibodies, all specifically targeted at
(D)        seemingly unlimited number of antibodies, all of them targeted specifically to
(E)        seemingly unlimited number of antibodies, each targeted specifically at

正确答案是E。我不理解的是Each指代的是什么？Antibodies？但是Each是个单数代词如何能指代复数的antibodies？

RyanR

each就是用来指代一个大群体（复数）中的每一个。如果你前面是单数，还怎么能说each（每个）呢？要就要用it了。