I think he is ________ to win, but I’m not sure.
It is exactly _____we behave _____has changed the world.
—I can’t find Xiao Ping, where did you see him this morning?—It was in the library______ he studied.
—________ matters to do the job well —what you are or where you come from?—Neither. It depends on whether you put your heart into it.
----How unhappy your roommate looks!----Yes,but he’s not willing to tell me what it is____ is troubling him.
It was along the Mississippi River _______ Mark Twain spent much of his childhood.