_______ that they may eventually reduce the amount of labor needed on construction sites by 90 percent.

　　A. So clever are the construction robots

　　B. So clever the construction robots are

　　C. Such construction robots are clever

　　D. Such clever construction robots are

 

 

     答案：A

    【解析】 such（A用在名词前（带或不带形容词），so用在形容词前（不带名词），例如：She was  embarrassed at such a request．对这样的请求她感到很为难。She was anxious about her daughter being out so late at night．女儿晚上外出，很晚不归，她为此担心。"so + 形容词 + a（n）+ 名词"结构常用于书面语。例如：I has never met so gentle a person． This is so beautiful a country．这是一个非常美丽的国家。

 用so和such的词组，后面可跟that引导的结果状语从句，例如：She made such a good meal that we all ate far too much．她莱烧得这么好，我们都吃得太多了。根据句意及结构，C Such construction robots are clever和 Dsuch clever construction robots are错误，可改为They are such clever construction robots…。

so或 such引起的短语位于句首，表示强调时，主句主谓要倒装。例如：So clever is the boy that we all like him．小孩子十分聪明，我们都喜欢他。 Such was the force of explosion that all the windows were broken．爆炸的威力很大，所有的窗子都震坏了。因此，A正确而B错误。