1. 用所给单词的适当形式填空

1. （1） I'm (interest)in English very much．
3. （2） They are dirty．Please tidy (they)up．
5. （3） Not only you but also I (be)working hard at it at the moment．
7. （4） What about going (sail)this weekend? That must be exciting．
9. （5） We look forward to (watch)the new movie by Jackie Chan．