自动升降桌:have you been to the Great wall? Not----

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A.yet B.never C.already D.either

呵呵，是应选A,再给你说说：

not yet表示“尚未, 还没有”，是很简洁的回答。
B never本身就是否定，不符。但如果在中间加一个逗号，就有意思了：not,never!表示“不，永远不”，很有力道的回答。
C already已经，通常肯定，与not搭配不伦不类。
D either,也，如果前面说“我没去过长城，你去过么”，勉强可以回答“not,either”，最好是Nor/Neither have I.

A.yet 表示还没有

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