that they may eventually reduce the amount of labor needed on construction sites by 90 percent．
A. Such construction robots are clever
B. So clever the construction robots are
C. Such clever construction robots are
D. So clever are the construction robots
网友回答
A. Such construction robots are clever
B. So clever the construction robots are
C. Such clever construction robots are
(答案→)D. So clever are the construction robots
解析：考查倒装句，so、such…that…句型中，so、such和修饰的词放在句首时，句子用部分倒装，句意是：建筑机器人是如此的聪明以至于它们最终减少了建筑工地上需要的90%的劳动力。选D。