Within a few years China ____ well have the most advanced railway industry in the world.

Some people          feel sick when they read a book in a car or on a boat．

 If you _____ smoke, please go outside.

--- Whose comic book is it?  --- It ________ be Daniel’s. He often shares his comic books with his friends.

—It looks as if it’s going to rain, but I’m not sure whether the windows are shut in my apartment.—You         as well go back to have a look.