Eighty percent of the students in this school______three to five times a week.( )
exercises.
exercise
exercising
—You_________ be happy with the strong public support you’ve received. —Yes, you’re right. I’m really excited.
()—Sandy, we need an actor for the action movie. __________ you play kungfu? —Sorry, I can’t.
---Who is making much noise? ---It ____ be Timmy. He is sleeping now.
-- Must I write down all the new words now? No, you_______
—Peter doesn’t mind lending you his camera. —He _______. I’ve already borrowed one.