PREP 21看either 的位置

the largest trade-book publisher in the us has announced the creation of a new digital imprint division, under which it will publish about 20 purely digital wowks to be sold either as electronic books or downloadble copies that can be printed upon purchase.

B works to sell them online, either as electronic books or

C wworks and it will well them online as either electronic books or as

D works, and selling them online as either electronic books or a

E works, and it will sell them online either as electronic books or

答案选A，哪位NN能帮我解答一下either的位子到底应该放在哪里？我当时做的时候就选了D，想着有两个AS也对称。

还有一个问题就是为什么A选项后面不需要as 呢？

LZ 的题目看错了。

正确的请看：

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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

请问为什么or后面不加AS呢？

either ... or 后面的对称啊。

A 选项 perfect 对称。 你的题目中的as 的位置错了。。