题目内容：

    For years, the U.S. has experienced a shortage of registered nurses. The Bureau of Labor Statistics projects that while the number of nurses will increase by 19 percent by 2022, demand will grow faster than supply, and that there will be over one million unfilled nursing jobs by then.

So what's the solution? Robots.

Japan is ahead of the curve when it comes to this trend. Toyohashi University of Technology has developed Terapio, a robotic medical cart that can make hospital rounds, deliver medications and other items. It follows a specific individual, such as a doctor or nurse, who can use it to record and access patient data. This type of robot will likely be one of the first to be implemented in hospitals because it has fairly minimal patient contact.

A robot's appearance affects its ability to successfully interact with humans, which is why the RIKEN-TRI Collaboration Center for Human-Interactive Robot Research decided to develop a robotic nurse called Actroid F. It is so human-like that some patients may not know the difference. This conversational robot companion has cameras in its eyes, which allow it to track patients and use appropriate facial expressions and body language in its interactions. During a month-long hospital trial, researchers asked 70 patients how they felt being around the robot and "only three or four said they didn't like having it around."

It's important to note that robotic nurses don't decide courses of treatment or make diagnoses, though robot doctors and surgeons may not be far off. Instead, they perform routine and laborious tasks, freeing nurses up to attend to patients with immediate needs. This is one industry where it seems the interaction of robots will lead to collaboration, not replacement.

1.What does the author say about Japan?

A.It ranks top in future robotics technology.

B.It takes the lead in offering robotic nursing.

C.It is in desperate need of registered nurses.

D.It provides the best medication for the elderly.

2.Which of the following best explains “implemented'' underlined in Paragraph 3?

A.Cancelled. B.Constructed. C.Improved. D.Applied.

3.What do we know about the robot Actroid F?

A.It has no difference from a human nurse.

B.It gets favorable remarks from all the patients.

C.It interacts with patients like a human companion.

D.It uses body language even more effectively than words.

4.What can be inferred from the last paragraph?

A.Cooperation will not be replaced.

B.Nurses will still play their roles.

C.The robotics industry will be promising.

D.Robots can meet patients' immediate needs.