再问885的section20-4

4.The aristocratic values expressed in the writings of Marguerite Yourcenar place her within the French classical tradition, as does her passionate interest in history, particularly Roman history.

(A) as does

(B) so do

(C) as do

(D) so is the case with

(E) similarly, does

答案是a, 为什么不能用do?我觉得do代place，her passionate interest in history是与 the french classical tradition平行，做状语成分，难道理解错了？

6.Because paper of all kinds is the biggest single component of municipal trash, many municipalities have tried recycling to reduce the cost of trash disposal.

应该为单数，此外，try to do 与 try doing 意思不同，前者为尽力，后者为尝试。

sale指代sell its profitable credit card subsidiary这一结果。

plans与is 是一致的

(D) with a rise in short-term rates, and they are unable to raise

and they are unable...与with短语不parallel,而是与前面的句子并列，导致逻辑意思不通。

谢谢juniya

主语是The aristocratic values，不是单数吧？如果是单数句子谓语怎么用place呢?

从句主语是单数:

as does her passionate interest in history