3D printers have been around us for some time. There is a lot you can do and image with a 3D printer. 1) ______ A company in China has recently used 3D printers to make ten full-sized housed in just 24 hours. 2) ______. These houses are printed wth special “ink ” that has been made from industrial construction waste. The using of cheap materials makes it possible to print each house under ＄5000. The CEO of the company says, “3) ______ ” He plans to set up 100 recycling factories across China and changing waste into cost-effective  “ink ”for 3D pri nters. 4) ______ However, at present, multi-storeys 3D-printed building are not allowed in China. So, it’s important that the 3D printing technology will be widely used to build any time soon. Maybe there be still a long way to go.

你应该亲自签收包裹。

You are  _______ to sign for your package in _______  .

Becky: Welcome back to “The Problem Line”. Okay, it’s time for another call. (1) _____

David: Hello! This is David.
Becky: Hi, David. Welcome to “The Problem Line”.(2) _____
David: W ell, I’m having problems with my mom. When we talk about something, we always argue.
Becky:  (3) _____   It’s impolite.
David: I know, but she plans everything for me. I can’t even decide what to wear on weekends.
Becky: That’s too bad. (4) _____
David: I tried, but she never listened. She thinks I should listen to her because I’m her child.
Becky: Well, that’s a difficult problem.(5) _____

Linda: Hello, I’m Linda. I think David should ask  his teacher for help. Perhaps his mother will listen to his teacher.
David: OK. I’ll have a try. Thank you!
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