(单选题)

What can we infer from the last paragraph?

A.The robot may have its limitations in practice.

B.The robot is by far the most efficient of its kind.

C.Assessments on the robot have been well conducted.

D.Workers don’t need to be trained to operate the robot.

参考答案：A

参考解析：

推理判断题。根据文章最后一段，可看出，垃圾分类并不简单，各个城市的垃圾成分不同，这些变量都会影响机器人的表现。在真实的环境中还需要受训上岗。这些都体现了这款机器人是有一定的局限性的。故选A。

知识点：阅读理解四选一英语专业基础知识阅读理解教师招聘-小学英语