C Complete the sentences with mustn't or don't have to. 16 You..... museum. touch the exhibits at the science 17 He play around in the lab. He could 20 You cause some damage to the equipment. 18 You ..........come to my office, you can send me the report by email. 19 You........ to anyone. tell your computer password be a technology expert to be interested in robots. 21 The IMAX theatre is a great experience and you.......... do anything but sit and enjoy it!

16. You mustn't touch the exhibits at the science museum.17. He mustn't play around in the lab. He could cause some damage to the equipment.18. You don't have to come to my office; you can send me the report by email.19. You mustn't tell your computer password to anyone.20. You don't have to be a technology expert to be interested in robots.21. The IMAX theatre is a great experience, and you don't have to do anything but sit and enjoy it!