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I. 用括号中所给词语的适当形式填空。
1. Li Ming, do you want to be an ___________ (act)?
2. Our class is ____________ (divide) into five groups.
3. She ran back to her seat __________ (direct) in no time.
4. How long have you __________ (involve) in this activity?
5. How about _________ (write) another book on this project?
