The red bike _______be Hu’s. She has a blue bike.

---Fifty dollars for such a T-shirt！You_____ be joking！--- I’m serious. It’s made of silk.

(2014·江苏四校第四次考试)It’s said that there are a large variety of coats in the store.It________be easy for you to find a suitable one.

— Listen! Jane is singing in the next room.— It             be her. She has gone to New York.

It has been announced that students _______ remain in their seats until all the papers have been collected.