It will be difficult for a robotthe same as humans.A. doB. to doC. doingD. does

问题补充：

It will be difficult for a robotthe same as humans.

A. do

B. to do

C. doing

D. does

答案：

A. do

(答案→)B. to do

C. doing

D. does

解析：句意：对于一个机器人来说与人做同样的事情将很难。It’s+adj.for sb.to do sth.这是一个固定句式，意思是：对某人来说做某事……，it 为形式主语，真正的主语是不定式，故选B。