With Chang'e-3 successfully landing, China bees the third country in the world that _______ on the moon.
----It's too late now. I think it's time for me to leave. ---- ____.
Is this school ____ you studied at ten years ago?
What the boy ____ make his friends happy.
----Where is Mary? ----At ____.
----Where ____ the dictionary? I can't see it anywhere.----I ____ it right here. But now it's missing.