A post office should be built in a central ______ for the sake of the convenience.
With Chang'e-3 successfully landing, China bees the third country in the world that _______ on the moon.
People Who Moved China, hosted by CCTV, honors the people _______ the valuable contributions should be remembered by every Chinese.
—I’m sorry I stepped on your foot; it was an accident.—It wasn’t! You did it ______________ .
How I wish we could study _________ there are fewer exams!
For quite a few students, their teacher’s advice is more important than _________ of their parents.