1. The film started fifteen minutes ago. The film has _______ for fifteen minutes. 2. To protect the environment is our duty. ____ is our duty ________ the environment. 3. I don't want to go to work. I'd rather stay at home. I'd rather stay at home ______ going to work. 4. With the help of the teacher, I found my lost watch. _______ the teacher, I found my lost watch. 5. Susan has been in this city for more than ten years. _____ more than ten years _______ Susan ________ to this city.