3．【答案】C

　　【解析】细节理解题。由倒数第二段第二句“The company's ‘Oshbot’ robot is built to assist customers in a store…”可知，Oshbot能够担任商店售货员，帮顾客购物。

　　4．【答案】B

　　【解析】推理判断题。最后一段讲的是社会机器人能够学会与人相伴。这段中有几处关键信息，如“to work alongside other employees”和“but with us”，可以帮助我们找到答案。选项中“be our workmates”与此相符，故选B项。

　　B

　　(2016辽宁实验中学高三上学期阶段测试，A)

　　I find it humorous sometimes that even the most ordinary incidents can have an impact on our awareness.

　　My wife, daughter, and I moved into our home nine years ago and we spent a lot of time and energy in the yard to get it looking like it does today.We live on a corner, higher than street level, and the entire side of the yard is surrounded by a professionally built rock wall.The front of the house though is another story because instead of a wall along the sidewalk, the rocks appear to be just thrown up onto the dirt as if someone were in a hurry to finish.

　　We did the best we could with what we had to work with and called this area our “rock garden”．Whenever we had leftover flowers or plants, Denise or I would stick them out front, just to bring some color to the area.

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