题目内容

13. How long does it take to look around the laboratory?About______ minutes.

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15. What is not allowed to do during the tour?______ .

14. What measures are taken to ensure the visitors’ safety?The visitors are required hats and______ .

12. What places will the visitors see in the company?______ and the laboratory.

11. What’s Peter Johnson’s ?He is the______ Manager.