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Here are the answers to your questions: 18. B. Congratulations 19. C. rocket 20. B. used 21. A. That's awful 22. C. by I. Rewrite these sentences in another way so that the meaning stays unchanged. 23. They were calling for help when the rescue workers appeared. -> While they were calling for help, the rescue workers appeared. 24. "I will do the housework tomorrow", Peter told me. -> Peter told me that he would do the housework the next day. 25. "Where are you having a video conference with other clubs next week?" Lan asked us. -> Lan asked us where we would have a video conference with other clubs the following week. II. Write sentences about Elias robot, using the words and phrases given. 26. Elias Robot /be / innovative/ language learning application. -> Elias Robot is an innovative language learning application. 27. Students/ be able/ practice/ multiple languages/ by/ listen/ speak/ Elias/ real-time. -> Students are able to practice multiple languages by listening to and speaking with Elias in real-time. 28. Elias Robot/ provide/ thematic lessons/ learn/ topics/ colors, seasons and emotions. -> Elias Robot provides thematic lessons to learn about topics such as colors, seasons, and emotions. 29. Teachers/ can/ freely/ modify/ lessons,/ even/ create/ new ones/ fit students' learning progn. -> Teachers can freely modify lessons, or even create new ones to fit their students' learning progress. 30. Elias Robot/ create/ safe and happy learning environment,/ encourage/ speak/ and/ there/ be no need/ worry/ mistakes. -> Elias Robot creates a safe and happy learning environment, encouraging students to speak and eliminating the need to worry about making mistakes. 31. communicate 32. with