Meeting robot friends.Today,AI robots play an important role in people\’s daily lives.These robots work in many areas to help people.
I\’m a teaching robot.My job is to spend time with children and teach them.I look like people because I want to get close to children.I walk like a human too.Turning around and avoiding obstacles（避障） are both easy for me.I can sing and dance.I can also know the needs of children by hearing their words and teach them knowledge （知识） on different subjects.
I\’m a medical（医疗的） robot.People often use me in the operating room（手术室）.Because of my stable（稳定的） hands and robot eyes,I can show some angles of view（视角） and can also move to some hard-to-get-to places in the human body.I can help doctors work better during operations.
We all know that technology make our life easier and more convenient （舒适的） than before.However,we should use it wisely.

（1）How many kinds of robot friends are introduced in the passage? ______
A.One.
B.Two.
C.Three.
D.Four.
（2）Why does the writer say the robots are people\’s friends? ______
A.Because they are interesting to kids.
B.Because they are helpful to people.
C.Because they can sing and dance.
D.Because all of them are important to doctors.
（3）How can the robot know the needs of children? ______
A.By walking like a human.
B.By teaching them knowledge.
C.By hearing what they say.
D.By turning around and avoiding obstacles.
（4）What is the structure（结构） of the article? ______
A.
B.
C.
D.