（教材对话原文)Michael: They are testing the 3D printer. Don’t you come and see it？Lucas:

(教材对话原文)

Michael: They are testing the 3D printer. Don’t you come and see it？

Lucas: What？ Never heard of it.

Michael: It is one of the most latest technological innovations.

Lucas: Really？{A; B; C; D; E}.

Michael: Come on! You should learn to be open-minded.

Lucas: {A; B; C; D; E}

Michael: The 3D printing technology could be used in construction, engineering, biomedicine, and many other fields. It can print anything, a house, a car, even a liver!

Lucas: That can’t be true. I will never believe this.

Michael:{A; B; C; D; E}.All these will be absolutely carried out by 3D printers. There’s a company called Natural Machines has introduced a 3D printer for food producing.

Lucas: I guess that there are a lot of procedures involved in this process. So this printer must be very big.

Michael:{A; B; C; D; E}. It can print all kinds of dessert and starter.

Lucas: Is it expensive？

Michael:{A; B; C; D; E}.

A. It is about $.1,000

B. Maybe its functions are questionable

C. It is really true.

D. What are the main functions of it？

E. In fact, it is as big as an oven