1. —They are testing the 3D printer. Don’t you come and see it? —What??_________??????????????????????
A. Where is it displayed?
B. It really matters.
C. That’s fine.


2. —?Do you?like that technology exhibition? — Yes, I?like it very much. _________?????????????????????.?
A. It finally comes true.
B. It shows me the impressive magic power of 3D printing.
C. It is a good chance.


3. — 3D printing?is one of the latest technological?innovations. —?____?Maybe its functions are questionable.
A. Really?
B. Exactly.
C. I think so.


4. 3D printing is just at the beginning stage. It is not ____.
A. mature
B. ripe
C. grown


5. ____?the new law is used one day, I hope it will not punish people using 3D printers for?personal purposes.?
A. when
B. why
C. If


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