搞不清到底是单数还是复数

104．The Federalist papers，a strong defense of the United States Constitution and important as a body of work in political science as well．represents the handiwork of three different authors．

(A)  and important as a body of work in political science as well，represents

(B)  as well as an important body of work in political science，represent

(C)  and also a body of work of importance in political science is representing

(D)  an important body of work in political science and has been representative of

(E)  and as political science an important body of work too, represent

Agreement + Parallelism

The subject of this sentence is the Federalist papers；this plural subject requires the plural verb represent．The subject is followed by a long modifying phrase set off by commas；both dements of the phrase should be parallel．Thus，important as a body of work should be revised so that is parallel to a strong defense．

A  Represents does not agree with the Federalist papers；important as a body of work is not parallel to a strong defense．

B  Correct．The plural verb represent agrees with the plural subject；an important body of work is parallel to a strong defense．
            

C  The present progressive is representing does not agree with the plural subject and wrongly suggests a developing situation；a body of work of importance in political science is wordy and awkward；the closing comma of the pair is omitted．

D  Omission of and is incorrect；has been representative does not agree with the plural subject，uses an incorrect tense，and introduces an awkward construction．

E  The inverted word order is awkward and is not parallel to a strong defense．

The correct answer is B．

主语虽然是复数形式，但是它的同位语使用的都是单数啊，我以为这是一个提示呢，所以就把papers当数了。。。这个题怎么理解啊？a strong defense and a body of work 不和前面的复数不一致么？

Chinese, the most ancient of living
writing systems, consists of tens of thousands of ideographic
characters, the most ancient of living writing systems, each character a miniature calligraphic composition inside its own square
frame．

那同位语和主语的单复数也不一样啊，这种情况允许么？

当然。同位语概念上就是对前面所指名词的一个解释说明。强调的侧重点不同，数就很可能不同。

主语为复数，同位语强调个体概念时完全可以用each这样的指代单数的代词。谓语只和主语一致。