Wouldn’t it be ____ wonderful world if all nations lived in ____ peace with one another?
Was it in 1969 _____ the American astronaut succeeded_____ landing on the moon?
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.