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6. It is u_____ that America Basketball Team lost the final game. 7. October 1st is an u_____ day because it’ s the birthday of China. 8. The Red Cross is a s_____ group. 9. That is a _____(完美的 ) plan. 10. What’ s the _____(主題 ) of the class meeting? Ⅱ. Complete the dialog. A: you ever to a science museum? B: Yes, I have. I to the National Science Museum last year. Have you ever been to a history museum? A: No, I . B: Me . Let’ s go to one tomorrow. 能力提升 Ⅲ . Complete the following sentences. 1. We have been to the Great Wall.(改為否定句 ) We _____ _____ to the Great Wall. 2. My mother has been to our school.(改為一般疑問句 ) _____ your mother _____ to your school? 3. Tom hasn’ t been there. I