阅读下面短文，并根据所读内容在表格中的空格处填入恰当的单词。
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“HEARTLESS”— a word you wouldn’t want to use to describe a person. But having his heart removed was what saved Craig Lewis’ life—and what made him the first living “heartless” man.
The 55-year-old，dying of heart disease，was told he only had 12 hours to live， when Billy Cohn and Bud Frazier, doctors from the Texas Heart Institute, decided to try something new. They removed Lewis heart and replaced it with an artificial (人造的) one. Less than a week after the operation, Lewis was able to sit and speak.
Lewis kept on living like a normal person, with only one difference—he didn’t have a heartbeat. The human heart usually pumps blood through our bodies by beating regularly. By contrast, this artificial heart pushes the blood forward with two moving blades(桨叶). If you were to touch Lewis or listen to his chest, you would not feel a heartbeat. If you hooked him up to an EKG(心电图) machine, the line would be flat.
Scientists have been trying to create a working artificial heart for years. Until now, all artificial hearts either broke down or caused blocks and infections.
But after five years of hard work, Dr Cohn and Dr Frazier developed this artificial heart. It is smaller and quieter than other artificial hearts and can last much longer. They tested it on 38 calves (牛犊) and all of them turned out energetic and healthy. Lewis is the first human proof that the machine is a success.
The doctors will have to work more on the device and decide on a final design before it can be widely used. The US Food and Drug Administration will also need to say that the machine is safe. But this artificial heart looks likely to bring a ray of hope to thousands of patients.

Passage outline	Supporting details
A 小题1:     in the history of medicine	◆ 55-year-old Lewis was on the 小题2:      of death. He was told that he only had 12 hours to live. ◆ Two     American  doctors had his heart 小题3:     and replaced it with an artificial one. That made Lewis the first living heartless man.
Differing from the human heart	◆ Lewis’ new heart pushes the blood forward with two moving blades. ◆ His heart rate is at 小题4:     with a 小题5:     line on the screen of an EKG machine.
小题6:     of this artificial heart	◆ It is smarter and quieter than other artificial hearts and can last much longer. ◆ It hasn’t yet broken down. Nor has it got 小题7:     and infected.
Reasons for being小题8:  about this artificial heart.	◆ The doctors will have to further 小题9:     the device before it is massively produced. ◆ Yet this artificial heart looks likely to bring the opportunity of 小题10:   to thousands of patients.