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【题目】I think it will be difficult ______ a robot _____ the same things as a person.

A. as; to do B. for; to do

C. for; doing D. as; doing

【答案】B

【解析】

试题分析:句意:认为对于机器人来讲,要和人做同样的事情难。本的宾语从句里是一个不定式作主的句子,其基本结构是:It be +adj. + for sb. + to do sth.即用it作形式主语后跟带to的不定式作句子真实的主语用介词for引出不定式的逻辑主语跟在不定式之前。故选B。

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