作者：英吉
The largest trade-book publisher in the United States has announced the creation of a new digital imprint division, under which it will publish about 20 purely digital works to be sold online as either electronic books or downloadable copies that can be printed upon purchase.
(A) works to be sold online as either electronic books or
(B) works to sell them online, either as electronic books or
(C) works and it will sell them online as either electronic books or as
(D) works, and selling them online as either electronic books or as
(E) works, and it will sell them online either as electronic books or
原文意思：大的出版商宣布发明了一种新技术，用这种技术他们可以出版出版20个digital work这种work将会在网上作为电子书被卖掉或者作为可下载的拷贝被卖掉
题目分析：原文由either or引导出了一个并列，A写的还凑合，留着。B的either as位置写反了，如果按照B的写法，应该是either as or as 这样写，杀。C中or后面又多了个as，你懂的，杀。D用and selling前面没有于此对应的表达方式，and就不能写，杀。E中or后面必须有as，否则不对应，杀。
