----______was it ______ they discovered the entrance to the underground palace?----Totally by chance.
It took me quite a long time to develop a voice, and _______ I have it, I am not going to be silent.
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!